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 that emits a combined light obtained by combining the light from the light source unit. The light source unit in Patent Document 1 also includes a plurality of optical components such as lenses and mirrors, as well as a photodetector. As exemplified by the light source unit in Patent Document 1, a light-emitting module that includes a light-emitting element and an optical control component that controls the light from the light-emitting element and emits 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 embodiments comprises a first light-emitting device having a plurality of first light-emitting sections, each having a light-emitting surface and 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-emitting surface, and a connection portion located between the light-emitting 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 portion 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 the first top surface of the housing and is partially exposed to the outside of the housing. [Effects of the Invention]

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

[0007] [Figure 1] FIG. 1 is a perspective view of a light-emitting module according to a first embodiment. [Figure 2] FIG. 2 is a top view of the light emitting module according to the first embodiment. [Figure 3] FIG. 3 is a perspective view of the housing of the light-emitting module according to the first embodiment, viewed 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. [Figure 5] FIG. 5 is a perspective view of the light-emitting module according to the first embodiment with the 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 cover 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] 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 guide 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 illustrating the structure of the light detecting 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] 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 where 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 INVENTION

[0008] In this specification and claims, polygons such as triangles and quadrilaterals are referred to as polygons, including shapes in which the corners of the polygons have been rounded, chamfered, corner-cut, rounded, etc. Furthermore, shapes in which processing has been applied not only to the corners (edges of the sides) but also to the middle portions of the sides are also referred to as polygons. In other words, shapes in which partial processing has been applied while retaining the polygonal base are included in the interpretation of "polygon" described in this specification and claims.

[0009] The same applies to words that describe specific shapes, such as trapezoids, circles, and irregularities, not just polygons. The same also applies when dealing with the sides that form the shape. In other words, even if the corners or middle part of a side are 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] Furthermore, 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, etc. merely describe the relationship of relative position, orientation, direction, etc., and do not necessarily correspond to the relationship in use. For example, even if a component and a finished product are mounted so that the top surface of the component is located on the side of the finished product, the top surface of the component remains the same.

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

[0012] For example, if there are objects in this specification that are distinguished by appending "first," "second," and "third," and the claims are written to refer only to the "first" and "third" in this specification, they may be distinguished by appending "first" and "second" in the claims for ease of reading. In this case, the objects appended with "first" and "second" in the claims refer to the objects appended with "first" and "third" in this specification.

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although the illustrated embodiments embody the technical concept of the present invention, they do not limit the present invention. Furthermore, in the following description, the same names and symbols indicate the same or similar components, and redundant explanations may be omitted as appropriate. Note that the size and positional relationship of 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 of the light-emitting module 1. FIG. 5 is a perspective view of the light-emitting module 1 with the lid 12 of the housing 10 removed. FIG. 6 is a schematic diagram 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 lid 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 line XX in FIG. 2. FIG. 11 is an enlarged view of the window 13 surrounded by the dashed line in the cross-sectional view of FIG. 10. FIG. 12 is a perspective view of a light-guiding section 141 constituting the window 13 in the light-emitting module 1.

[0015] In FIG. 3, the light guide portions 141 of the three window portions 13 of the housing 10 are omitted. In the perspective view of FIG. 5, the light-transmitting member 140 of the window portion 13 of the lid portion 12 is not omitted. In the top view of FIG. 7, the components constituting the light-emitting unit 20 are enclosed in a dashed frame and hatched. In FIG. 8, the optical path of light is indicated by a dotted line, and the light-transmitting member 140 and three light guide portions 141 are indicated for convenience. In FIG. 8, a protective region formed by the protective member 27 for protecting the wiring is indicated by hatching. In addition, FIG. 9 is a side view of the wavelength conversion member 26 and the protective member 27 arranged in the base 11, as seen from the light-emitting device 21 side of the light-emitting unit 20, with other components omitted.

[0016] The light emitting module 1 has multiple 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 light emitting module 1 shown in the figure has multiple light emitting units 20 and multiple optical members 30. Specifically, the light emitting module 1 shown in the figure 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 arranged 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 in the housing 10.

[0018] Furthermore, 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. Furthermore, 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. (Housing 10) The housing 10 has a top surface, a bottom surface, and multiple side surfaces. The housing 10 may also have multiple top surfaces. In the illustrated example of the light-emitting module 1, the housing 10 has three top 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. However, 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 both 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 interposed 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 top and bottom 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 that face each other across the placement area 110, and one second side surface that intersects with the two first side surfaces. In addition, on each of the two first side surfaces, the side opposite the side that intersects 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 placement area 110 intersects with top surface 121 (first top surface) on the opposite side to the side where it intersects with the plane having the placement area 110. In the example of the light-emitting module 1 shown in the figure, 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 placement area 110, with the side surface as the 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 it intersects with the plane having the placement area 110, and is located lower than the first top surface.

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

[0026] The housing 10 has a window 13 that includes 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 one of the surfaces that constitute the housing 10. Each of the plurality of windows 13 is provided on one of the plurality of side surfaces. Note that the window 13 may also be provided on the first top surface.

[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 also be provided on one surface of the housing 10.

[0028] Housing 10 has a surface on which two or more of the plurality of window portions 13 are provided, and a surface on which only one of the plurality of 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 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 plurality of window portions 13 have an exit opening 14 that serves as a light extraction port. The plurality of window portions 13 includes two or more window portions 13 each having a different area of ​​the exit opening 14. In the example of the light-emitting module 1 shown in the figure, the plurality of window portions 13 includes two window portions 13 each having a different area of ​​the exit opening 14. Furthermore, the window portion 13 provided on the first side surface has a larger area of ​​the exit opening 14 than any of the window portions 13 provided on the second side surface.

[0031] The housing 10 has a surface in which one or more through holes are formed. The 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 the 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 the window portions 13 are provided (see FIG. 3). An emission port 14 is also provided within this through hole. The through hole may be the emission port 14.

[0032] A window 13 is provided in each of the plurality of through holes. The through holes may be the window 13 of the housing 10. The window 13 is formed, for example, by covering 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 13 is formed by fitting light guide 141 having a light guide path into the through hole. Light guide 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 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 exit surface of this 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 where the through hole is formed. For the connection, screws, adhesive, or the like can be used.

[0036] The filter 144 transmits or blocks light within 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 limited.

[0037] Furthermore, a connection hole 15 is formed in the housing 10. The connection hole 15 is formed on 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 on 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 plurality of side surfaces that intersect with the arrangement area 110 and a first top surface. The lid 12 also has a plurality of window portions 13. The lid 12 also has a connection hole 15. In the example of the light-emitting module 1 shown in the figure, 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 a metal such as aluminum as the main material. Each surface of the housing 10, except for the exit 14 of the window portion 13, is formed from a material having light-blocking properties. Having light-blocking properties means that the transmittance of visible light is 5.0% or less. Note that materials other than metals may also be used as the main material. Also, the light-blocking properties may be imparted by surface treatment.

[0040] (Lighting unit 20) The light-emitting unit 20 has one or more light-emitting elements and is a unit configured with one or more components including the light-emitting elements. For example, the light-emitting unit 20 can be configured to include a wavelength conversion member 26 in addition to the light-emitting elements. Furthermore, for example, the light-emitting unit 20 can be configured to include 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. It is also included, for example, in the wavelength range of light converted by a wavelength conversion member based on the light from the light-emitting element and then emitted.

[0042] The light in the specific wavelength range includes light with 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 falls within the specific wavelength range. When light in the specific wavelength range is converted by a wavelength conversion member and emitted, the peak wavelength of the light converted by the wavelength conversion member and emitted falls within 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 include 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 include optical members other than these. Furthermore, the light-emitting unit 20 may not include 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 collimating 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 condenser lens (optical member 24) that condenses the light emitted from the plurality of light-emitting elements, a wavelength conversion member 26 onto 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] Furthermore, the light-emitting unit 20 can be configured to include one or more light-emitting devices 21 each having a plurality of light-emitting elements mounted thereon. The light-emitting device 21 also includes one or more light-emitting sections 22 that emit light from the plurality of light-emitting elements to the outside. The light-emitting device 21 also includes a connection section 23 that electrically connects the plurality of light-emitting elements to the light-emitting elements.

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

[0049] The connecting portion 23 has a first surface provided with a wiring area for wiring and a second surface opposite the first surface. The first surface of the connecting portion 23 is located between the light emitting surface and the second mounting surface. The first surface of the connecting 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. Each light-emitting device 21 has a plurality of light-emitting sections 22. 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, resulting in a four-row and four-column arrangement of light-emitting sections 22.

[0051] A semiconductor laser element is used as the light-emitting element. Alternatively, an LED, an organic EL, or the like may be used. For example, the light-emitting element may use light whose emission peak wavelength is in the range of 365 nm to 494 nm. However, light having a peak wavelength outside this range may also be used. Furthermore, the wavelength range of the light is not limited to 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 include 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 multiple light-emitting units 20, the multiple light-emitting units 20 may include two or more light-emitting units 20 that emit light of different colors.

[0054] Here, blue light refers to light whose emission peak wavelength is in the range of 430 nm to 494 nm. Purple light refers to light whose emission peak wavelength is in the range of 365 nm to 430 nm. Light-emitting elements that emit blue or purple light include semiconductor laser elements containing nitride semiconductors. Examples of nitride semiconductors that can be used include GaN, InGaN, and AlGaN.

[0055] The wavelength conversion member 26 emits light of a different wavelength based on part or all of the light of a predetermined wavelength that is incident on the wavelength conversion member 26. In other words, only 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 includes, 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] Furthermore, the wavelength conversion member 26 can be configured to include a wavelength conversion unit 261 and a conversion control unit 262. The wavelength conversion unit 261 emits light converted to a different wavelength. The conversion control unit 262 controls the operation of the wavelength conversion unit 261 or the wavelength conversion effect performed by the wavelength conversion unit 261. The wavelength conversion unit 261 is connected to the conversion control unit 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 a rotating phosphor wheel, heat generated by the phosphor due to irradiation with light can be dispersed, reducing deterioration.

[0059] The conversion control unit 262 operates when power is supplied to it. Therefore, it has a connection unit for electrically connecting it 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 that rotates 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 near 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 of the conversion control unit 262 opposite to the surface 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 that extends from a position connected to the conversion control unit 262 in a direction toward the wavelength conversion unit 261. 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 traveling to the wavelength conversion unit 261 is not obstructed by the wiring connected to the connection unit 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 obstructing 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] Furthermore, the optical member 30 has high transmittance for light in a wavelength range different from the wavelength range for which it has high reflectance. Here, high transmittance 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 of the upper surface, lower surface, or side surface can be the mounting surface. The heat sink 40 dissipates heat generated from the 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, we will explain the light-emitting module 1. One or more light-emitting units 20 are arranged in an arrangement region 110 of the housing 10. One or more optical members 30 are also arranged in the arrangement region 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 covering 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 the fourth upper surface of the base 11 of the housing 10. Furthermore, 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 top surface of the housing 10 is provided directly above the one or more light-emitting units 20. The top surface of the housing 10 is also provided directly above the one or more optical members 30. Note that a portion of one or more light-emitting units 20 may be exposed through the opening. In other words, the top surface of the housing 10 may not be located directly above this portion.

[0070] The one or more light-emitting units 20 are surrounded by the bottom surface and the side surfaces of the housing 10. The one or more light-emitting units 20 are also arranged between the top and bottom surfaces 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 the side surface of the heat sink 40. The same applies to this paragraph 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 plurality of light-emitting units 20 are arranged side by side from one first side surface to the other first side surface. Furthermore, the plurality of optical members 30 are arranged in an arrangement region 110 in the base 11 of the housing 10. Furthermore, the plurality of 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 devices 21 mounted on the mounting surface of the heat sink 40 are disposed in the arrangement region 110 of the housing 10.

[0073] The 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 connected directly to the mounting surface of the heat sink 40 or may be connected via another member. When another member is used, 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, the side surface of the heat sink 40 located near the opening serves as the mounting surface on which the 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 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 light-emitting device 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, with a portion thereof exposed to the outside of the housing 10. Furthermore, the connection portion 23 extends from below to above the third top surface of the housing 10. In other words, a portion 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 it 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 considered a wiring mounting surface to which one or more light emitting elements 21 are electrically connected.

[0077] Furthermore, the connection portion 23 is disposed below the first top surface of the housing 10. In other words, the connection portion 23 does not extend above the first top surface of the housing 10. The connection portion 23 can be protected by providing a third top surface in the housing 10 that is lower than the first top surface and exposing the connection portion 23 between the first top surface and the third top surface. For example, even if a flat surface of another module is disposed on the first top surface of the light-emitting module 1, contact between the other module and the connection portion 23 can be avoided, and a light-emitting module 1 that is easy to handle 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 another 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 the same. 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] Furthermore, in the illustrated example of the light-emitting module 1, the plurality of light-emitting units 20 include a light-emitting unit 20 having a wavelength conversion member 26. In such a light-emitting unit 20, light whose wavelength has been converted by the wavelength conversion member 26 becomes light of 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 whose wavelength has been converted does not become light of the specific wavelength range.

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

[0081] For example, the illustrated light-emitting module 1 includes, as such light-emitting units 20, light-emitting units 20 each having one or more light-emitting elements that emit light having a peak emission wavelength in the range of 430 nm to 494 nm, and a wavelength conversion member 26 that includes a LAG phosphor. The illustrated light-emitting module 1 also includes light-emitting units 20 each having one or more light-emitting devices 21 that emit light having a peak emission wavelength in the range of 430 nm to 494 nm, and a wavelength conversion member 26 that includes a LAG phosphor.

[0082] Furthermore, in the illustrated example of the light-emitting module 1, the plurality of 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 that is emitted from the light-emitting unit 20.

[0083] For example, the illustrated light-emitting module 1 includes, as such a light-emitting unit 20, a light-emitting unit 20 having one or more light-emitting elements that emit light having a peak emission wavelength in the range of 365 nm to 430 nm. The light-emitting module 1 also includes a light-emitting unit 20 having one or more light-emitting devices 21 that emit light having a peak emission wavelength in the range of 365 nm to 430 nm. However, the light-emitting module 1 does not include a component equivalent to the wavelength conversion member 26.

[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, it does not have 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 the 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] 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. Alternatively, the plurality of light-emitting units 20 may include two or more light-emitting units 20 that emit light in the same wavelength range. Alternatively, 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 emitting light with a different peak wavelength. 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 to different wavelengths. Each of the two light-emitting units 20 directs light from the light-emitting device 21 into a different wavelength conversion region.

[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 light emitted from the light-emitting device 21 of one of the two light-emitting units 20 is incident to the position where light emitted from the light-emitting device 21 of the other light-emitting unit 20 is incident.

[0089] Furthermore, 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 travels 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 travels 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 on the optical path along which the light emitted from the light-emitting section 22 closest to the conversion control section 262 exits 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 incident 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 formed between this second direction and the protective portion 272 is equal to or smaller than the angle formed between this second direction and the direction in which light emitted from the light-emitting portion 22 closest to the conversion control portion 262 travels from the condenser lens to the wavelength conversion portion 261. Both angles are acute angles. Such a protective portion 272 can prevent the wiring connected to the conversion control portion 262 from interfering with the optical path.

[0093] Furthermore, 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 toward wavelength converting portion 261, thereby making it 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 then extends from there toward the connection hole 15 and out of the housing 10. At this time, the wiring extending from the conversion control unit 262 toward 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 top view. In addition, the protective member 27 protects the wiring to a sufficient height with the protective portion 272 (see FIG. 9). This allows the wiring to be directed toward 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 from an external power source.

[0095] In the light-emitting unit 20, which includes a light-emitting device 21 having a plurality of light-emitting portions 22, a condenser lens (optical member 24), a wavelength conversion member 26, and a collimating lens (optical member 28), the wavelength conversion member 26 is disposed between the condenser lens and the collimating lens. The wavelength conversion member 26 is disposed closer to the collimating lens than the condenser lens. Preferably, the wavelength conversion member 26 is disposed near the collimating lens. Because wavelength-converted light is emitted from the wavelength conversion member 26 over a wide angular range, collimated light with a small spot diameter can be obtained by bringing the wavelength conversion member 26 closer to the collimating lens. As a result, when collimating the same amount of light, the lens surface area of ​​the collimating lens can be designed to be smaller.

[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 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. Furthermore, light in a specific wavelength range emitted from one light-emitting unit 20 is incident on one corresponding optical member 30. Furthermore, in the example of the light-emitting module 1 shown in the figure, light in a specific wavelength range emitted from one 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. Each optical member 30 also transmits a portion of the light in this specific wavelength range. The transmitted light travels toward the second side surface of the housing 10.

[0099] The light-emitting module 1 includes an optical member 30 that has high reflectivity over the entire specific wavelength range for light in the specific wavelength range emitted 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 reflectivity and the transmittance.

[0100] When the wavelength range of the spectrum of light emitted from the light-emitting unit 20 is narrow, reflected light and transmitted light can be generated by an optical member 30 with such properties. In the example of the light-emitting module 1 shown in the figure, an optical member 30 with such properties is applied to an optical member 30 corresponding to a light-emitting unit 20 that does not have a wavelength conversion member 26, in other words, a 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 part of a specific wavelength range and high transmittance in another part of the specific wavelength range for light from a corresponding light-emitting unit 20. In this case, the proportion of reflected light and the proportion of transmitted light relative 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 with high reflectance and the amount of light in the wavelength range with high transmittance.

[0102] In this way, 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 example of the light-emitting module 1 shown in the figures, the optical member 30 is applied to the light-emitting unit 20 having the wavelength conversion member 26, in other words, the optical member 30 corresponds 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 that travel in different directions 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 windows 13 of the housing 10. In the example of the light-emitting module 1 shown in the figure, the light reflected by the optical member 30 is emitted from the window 13 provided on one of the two first side faces of the housing 10.

[0105] Furthermore, in the light-emitting module 1, light transmitted through one or more optical members 30 is emitted to the outside of the housing 10 from one of the multiple windows 13 of the housing 10. In the example of the light-emitting module 1 shown in the figure, light transmitted through the optical member 30 is emitted from the window 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 lights 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 plurality of window portions 13 includes a first window portion that extracts light (first light and second light) emitted from each of the two light-emitting units 20 (first light and second light). The plurality of window portions 13 also includes 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 member 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 plurality of window portions 13 includes two window portions 13 (second window portions) different from the first window portion, one of which extracts the first light and the other of which extracts the second light. The plurality of window portions 13 also includes 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 by 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 each of the different windows 13.

[0111] The multiple light beams emitted from the multiple light-emitting units 20 to the outside through the first window are combined into a combined light beam, 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 combined light beam passing through the same axis and extracted from the first window. This allows the combined light beam emitted from the multiple light-emitting units 20 and the light beam emitted from one light-emitting unit 20 to be extracted separately from different windows 13.

[0112] In this way, by providing window 13 through which each light is emitted separately from window 13 through which the combined light is emitted, it is possible to easily handle the combined 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 element 30 and passes through the optical element 30 corresponding to the light-emitting units 20 located closer to the first window. A composite light can be generated in this way.

[0114] A first window section through which the multiple lights emitted from the multiple light-emitting units 20 are extracted collectively, and two or more second window sections through which the multiple lights emitted from the multiple light-emitting units 20 are extracted separately 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 example of the light-emitting module 1 shown in the figures, 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 prevent 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 that has high reflectivity over the entire wavelength range of light in a specific wavelength range emitted from the corresponding light-emitting unit 20, and an optical element 30 that has high reflectivity over a portion of the wavelength range of light in the specific wavelength range emitted from the corresponding light-emitting unit 20 and has 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 properties can be used depending on the wavelength range, and the light can be separated 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 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 window portions 13 in a light-emitting module having a plurality of window portions 13. That is, it shows an embodiment in which each light controlled in the light-emitting module 1 is utilized outside the light-emitting module 1. The light-emitting module 2 has one or more light-detecting members 50, and the light-detecting members 50 detect light emitted from the one or more window portions 13.

[0122] The light-emitting module 2 according to the second embodiment differs from the light-emitting modules of the previously described embodiments in that it includes a light-detecting member 50. In addition, the light-emitting module 2 according to the second embodiment can otherwise adopt the same configuration as the light-emitting modules of the previously described embodiments.

[0123] (Light detecting 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 connecting member 52 fixes the light receiving element 51 in a predetermined position. The connecting 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 connecting member 52.

[0125] (Light-emitting module 2) In the light-emitting module 2, the light-detecting 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 13 is provided as the boundary. The window 13 through which the light passes is provided between the light-detecting member 50 and the light-emitting unit 20 that emits light to be detected by the light-detecting member 50. In the illustrated example of the light-emitting module 2, the second side surface is disposed between the light-detecting member 50 and the light-emitting unit 20.

[0126] That is, the light emitting module 2 according to the second embodiment can be manufactured by manufacturing the light emitting module 1 according to the first embodiment and then attaching the light detecting member 50. Note that the component to be added later does not have to be limited to the light detecting member 50.

[0127] Furthermore, for example, if the light emitted to the outside of the housing 10 through the window 13 is not to be utilized, the light can be blocked by a light blocking plate instead of the light detection member 50. In this way, depending on how the light emitted from the window 13 is to be utilized or not utilized, components can be added to realize a light-emitting module 2 that suits the utilization method.

[0128] The light-emitting module 1 can be easily used to realize a light-emitting module equipped with a light-shielding plate, the light-emitting module 2, etc. The light-emitting module 1 can be easily used to realize a light-emitting module equipped with a light-shielding plate, the light-emitting module 2, etc. The light-emitting module 2 can also be easily used to realize a light-emitting module having a light detection function and being able to easily control the output of each light.

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

[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 allows the light emitted from each of the multiple light-emitting units 20 to be detected separately.

[0131] The light receiving element 51 of the light detection member 50 is disposed opposite the light exit 14 of the window portion 13. Light emitted from the light exit 14 of the window portion 13 is irradiated onto the light receiving element 51. In the example of the light emitting module 1 shown in the figures, the area of ​​the light receiving surface of the light receiving element 51 is smaller than the area of ​​the light exit 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 light exit 14 of the window 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 figures, priority is given to the response speed rather than the amount of light received.

[0133] <Third embodiment> Next, a light-emitting module 3 according to a third embodiment will be described. Figs. 15 to 19 are drawings 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 XVII-XVII cross-sectional line 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 the line XX in Fig. 16 is the same as Fig. 10. The hatched area in Fig. 19 indicates the area 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] 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 housing 10. 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 housing 10. In other respects, 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 having a lens member 145 (a first light guiding section) and a light guiding section 141 not having a lens member 145 (a second light guiding section). The light emitting module 3 does not have to have a second light guiding section. For example, all of the light guiding sections 141 may be first light guiding sections.

[0137] (1st light guide part) The lens member 145 of the first light guiding unit is, for example, a condensing lens that condenses light incident on the window unit 13. Note that it does not have to be a condensing lens, and a diffusing lens or a collimating lens, for example, 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 addition, 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 guide path formed by light guiding member 142 and is concentrated towards exit port 14. In addition, the point at which light that has passed through lens member 145 is concentrated is on exit port 14 or outside housing 10.

[0139] (Second light guide) The second light guiding section can employ the light guiding section 141 described in the 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. Furthermore, the area of ​​the incident surface of light at window portion 13 of the first light guiding section is larger than that of the second light guiding section. Furthermore, 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 section is provided in a window 13 on the second side surface. The plurality of windows 13 provided on the second side surface includes a window 13 in which the first light guiding section is provided. The plurality of windows 13 provided on the second side surface includes a window 13 in which the second light guiding section 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 the window section 13 that extracts light transmitted through an optical element 30 that has high reflectivity over the entire 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 an optical element 30 that has high reflectivity in part of the specific wavelength range and high transmittance in another part of the specific wavelength range for light 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 onto 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 one of the multiple light emitting units 20 that extracts less light.

[0146] In the illustrated example of the light-emitting module 3, the focal point of the light focused by the lens member 145 of the first light guide section is set outside the housing 10. For example, as shown in the enlarged view, if the light-detecting member 50 is located outside the housing 10, it is advisable to set the focal point on the light-receiving surface of the light-receiving element 51 of the light-detecting 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. Figs. 20 to 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 wires 70, a plurality of connectors 60, and a base plate 80. In other respects, the same configuration as the light-emitting modules of the previously described embodiments can be adopted.

[0149] (Wiring 70) For example, flexible printed circuits (FPC) 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 portion v, each of which connects to a terminal. The first connector portion 61 and the second connector portion 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] Furthermore, 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. Furthermore, 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 also include two connectors 60 having different lengths of conductive portions 63 connecting the first connector portion and the second connector portion. The difference in length of the conductive portions 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 and 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 top of a heat sink 40. In a top view, the base plate 80 is disposed opposite 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 that faces 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 at least half the length of the shortest wire 70 among the plurality of wires 70, at least half the length of the longest wire 70 among the plurality of wires 70, and shorter than the length of the shortest wire 70 among the plurality of wires 70. By arranging the wires 70 at this interval, the plurality of wires 70 can be stably connected.

[0157] The plurality of connectors 60 are arranged on the upper surface of the light-emitting module 4. The plurality of connectors 60 are also arranged on the heat sink 40. The plurality of 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 using 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 the first connector portion 61 and the second connector portion 62, the first connector portion 61 is closer to the light emitting device 21. The first connector portion 61 has a connection port for connecting to a terminal facing toward the second side surface, and the second connector portion 62 has a connection port for connecting to a terminal facing in the opposite direction.

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

[0160] Of 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 offset 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, the distance between the first connector portion 61 of one of the adjacent connectors 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, the 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 is the same as 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, 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, thereby reducing the area required to arrange 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 first connectors is the same as the number of 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 first connectors and second connectors is the same as the number of 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 connects the plurality of light emitting devices 21 and the plurality of connectors 60. Terminals of the wirings 70 are connected to the first connector portion 61 of the connector 60. The wirings 70 are also connected to the connection portion 23 of the light emitting device 21. For example, the wirings 70 are connected to the 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 achieve a compact size, while the second connector parts 62 are aligned to realize 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 this 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 using multiple connectors 60 whose conductive portions 63 have the same length.

[0172] In the light-emitting module 5, when viewed from above, a plurality of connectors 60 are alternately arranged along the fifth direction in two regions separated by a straight line extending in the fifth direction as a boundary line. 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] Furthermore, 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, or 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 embodiments. 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 embodiments. Furthermore, the present invention can be applied without necessarily including all necessary and sufficient components. For example, if the claims do not recite some of the components of the light-emitting device disclosed in the embodiments, the claims allow for the design freedom of those components by those skilled in the art, such as substitution, omission, modification of shape, and change of material, and specify that the invention described in the claims is applicable. [Industrial Applicability]

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

[0177] 1, 2, 3, 4, 5 Light-emitting modules 10. Cabinet 11 Base 110 Placement area 112, 114 Top surface 12 Lid 121, 123 Top surface 13 Window section 14 Exit 140 Translucent material 141 Light guide section 142 Light guide member 143 Connecting member 144 filters 145 Lens components 15 Connection hole 20 Lighting Unit 21 Light-emitting device 22 Light-emitting part 23 Connection 24 Optical components (condensing 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 Heatsink 50 Light detection member 51 Photodetector 52 Connecting member 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 first light; a second light emitting unit having one or more second light emitting elements and emitting 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 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 the different direction through the second optical member.

2. 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 the light emitted from the plurality of first light emitting elements, a wavelength conversion element onto which the focused light is incident, and a collimating lens that collimates the first light emitted by the wavelength conversion element.

3. 3. The light-emitting module according to claim 1, wherein the second light-emitting unit comprises a plurality of the second light-emitting elements, a focusing lens that focuses the second light emitted from the plurality of second light-emitting elements, a diffusion plate that diffuses the focused second light, and a collimating lens that collimates the diffused second light.

4. 4. The light-emitting module according to claim 1, 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 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 the 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 has the first window on a first surface thereof, and the second and third windows on a second surface thereof that is different from the first surface.

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

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. 9. The light-emitting module according to claim 1, 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 having conductive portions with 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 in a direction in which the conductive portions are connected.

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