Light Emitting Module

Abstract

To provide a light-emitting module that can be made thin.SOLUTION: A light-emitting module includes a light source, a first lens that transmits light from the light source and is at least partially elastically deformable, and a drive unit that moves the first lens in a direction along the optical axis of the first lens, and the light source includes an abutted portion at which the first lens abuts, and the movement of the first lens changes the state of the first lens with respect to the abutted portion.SELECTED DRAWING: Figure 8B

Description

[Technical field]

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

[0002] Conventionally, light-emitting modules including light-emitting diodes and the like have been widely used. For example, Patent Document 1 discloses a configuration in which a first surface of a light-transmitting elastic member has a higher elastic modulus than a second surface opposed to the first surface, and the second surface of the elastic member is selectively deformed by applying pressure to the second surface side of the elastic member to vary the focal length. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-311213 A Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for a light emitting module to be thin.

[0005] An object of an embodiment of the present disclosure is to provide a light-emitting module that can be made thin. [Means for solving the problem]

[0006] An illumination module according to one embodiment of the present disclosure includes a light source, a first lens that transmits light from the light source and has at least a portion that is elastically deformable, and a drive unit that moves the first lens in a direction along the optical axis of the first lens, wherein the light source includes an abutment portion against which the first lens abuts, and movement of the first lens changes the state of the first lens relative to the abutment portion. Effect of the Invention

[0007] According to the embodiments of the present disclosure, a light emitting module that can be made thin can be provided. [Brief description of the drawings]

[0008] [Figure 1] 1 is a top view illustrating a schematic configuration example of a light emitting module according to a first embodiment. [Diagram 2] 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] 2 is a cross-sectional view illustrating a schematic example of a light source in the light-emitting module of FIG. 1. [Figure 4] FIG. 11 is a cross-sectional view illustrating a first modified example of a light source. [Diagram 5] FIG. 11 is a cross-sectional view illustrating a second modified example of the light source. [Figure 6] FIG. 11 is a cross-sectional view illustrating a schematic configuration of a third modified example of the light source. [Figure 7] FIG. 11 is a cross-sectional view illustrating a schematic fourth modified example of the light source. [Figure 8A] 1. FIG. 4 is a first diagram illustrating an example of a change in state of a first lens in the light emitting module of FIG. [Figure 8B] 1. FIG. 4 is a second diagram illustrating an example of a change in state of the first lens in the light emitting module of FIG. [Figure 9A] 8B is a schematic diagram showing an example of irradiation light in the state of FIG. 8A. [Figure 9B] FIG. 8C is a schematic diagram showing an example of irradiation light in the state of FIG. 8B. [Figure 10A] FIG. 1 is a first diagram illustrating a first lens according to a first modified example and an example of state changes thereof. [Figure 10B] FIG. 2 is a second diagram illustrating a first lens according to the first modified example and an example of a change in state of the first lens; [Figure 11A] FIG. 13 is a first diagram illustrating a first lens according to a second modified example and an example of state changes thereof. [Figure 11B] FIG. 2 is a second diagram illustrating a first lens according to a second modified example and an example of a change in state thereof. [Figure 12] 13 is a top view illustrating a schematic example of a light source in the light emitting module according to the second embodiment. FIG. [Figure 13] 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12. [Figure 14A] FIG. 1 is a first diagram illustrating a first modified example of a light source according to a second embodiment. [Figure 14B] FIG. 2 is a second diagram illustrating a first modified example of the light source according to the second embodiment. [Figure 15A] FIG. 11 is a first diagram illustrating a second modified example of the light source according to the second embodiment. [Figure 15B] FIG. 2 is a second diagram illustrating a second modified example of the light source according to the second embodiment. [Figure 16A] FIG. 1 is a first diagram illustrating a third modified example of the light source according to the second embodiment. [Figure 16B] FIG. 2 is a second diagram illustrating a third modified example of the light source according to the second embodiment. [Figure 17A] FIG. 1 is a first diagram illustrating an example of a light emitting module according to a third embodiment. [Figure 17B] FIG. 2 is a second diagram illustrating an example of a light emitting module according to a third embodiment. [Figure 18A] FIG. 17B is a schematic diagram showing an example of irradiation light in the state of FIG. 17A. [Figure 18B] FIG. 17C is a schematic diagram showing an example of irradiation light in the state of FIG. 17B. [Figure 19A] FIG. 1 is a first diagram illustrating an example of a light emitting module according to a fourth embodiment. [Figure 19B] FIG. 2 is a second diagram illustrating an example of a light emitting module according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The light-emitting module according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, the following embodiments are merely illustrative of the light-emitting module for embodying the technical idea of ​​the present embodiment, and are not limited to the following. Furthermore, the dimensions, materials, shapes, and relative arrangements of the components described in the embodiments are merely illustrative examples, and are not intended to limit the scope of the present disclosure, unless otherwise specified. The size, positional relationship, etc. of the components shown in each drawing may be exaggerated to clarify the explanation. In the following explanation, the same names and symbols indicate the same or similar components, and detailed explanations will be omitted as appropriate. An end view showing only a cut surface may be used as a cross-sectional view.

[0010] In the figures shown below, directions may be indicated by the X-axis, Y-axis, and Z-axis, but the X-axis, Y-axis, and Z-axis are mutually orthogonal directions. The X-direction along the X-axis and the Y-direction along the Y-axis indicate directions along the light-emitting surface of the light source included in the light-emitting module according to the embodiment. The Z-direction along the Z-axis indicates a direction orthogonal to the light-emitting surface. In other words, the light-emitting surface of the light source is parallel to the XY plane, and the Z-axis is orthogonal to the XY plane.

[0011] The direction in which the arrow points in the X direction is expressed as the +X direction or +X side, and the opposite direction of the +X direction is expressed as the -X direction or -X side. The direction in which the arrow points in the Y direction is expressed as the +Y direction or +Y side, and the opposite direction of the +Y direction is expressed as the -Y direction or -Y side. The direction in which the arrow points in the Z direction is expressed as the +Z direction or +Z side, and the opposite direction of the +Z direction is expressed as the -Z direction or -Z side. In the embodiment, the light source provided in the light emitting module emits light to the +Z side, as an example. Furthermore, the term "top view" in the embodiment means viewing the object from the +Z direction. However, these do not limit the orientation of the light emitting module when it is used, and the orientation of the light emitting module is arbitrary. Furthermore, in the present embodiment, the surface of the object when viewed from the +Z direction or +Z side is expressed as the "top surface", and the surface of the object when viewed from the -Z direction or -Z side is expressed as the "bottom surface". In the following embodiments, "along the X axis, Y axis, and Z axis" includes the object having an inclination within a range of ±10° with respect to these axes. In this embodiment, the orthogonal angle may have an error of within ±10° with respect to 90°.

[0012] [First embodiment] <Configuration example of light emitting module 100> The configuration of a light emitting module 100 according to a first embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a top view that illustrates a schematic diagram of an example of the light emitting module 100. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1.

[0013] As shown in Fig. 1, the light emitting module 100 has a substantially rectangular outer shape when viewed from above. As shown in Fig. 1 and Fig. 2, the light emitting module 100 has a light source 1, a first lens 2, and a driving unit 3. The light source 1, the first lens 2, and the driving unit 3 are accommodated inside a housing 4.

[0014] The light source 1 is mounted on the upper surface (the surface on the +Z side) of a mounting substrate 5. The mounting substrate 5 is a plate-like member having a substantially rectangular outer shape when viewed from above. The mounting substrate 5 is a substrate equipped with wiring on which light-emitting elements and various electric elements can be mounted.

[0015] The light source 1 emits light upward (+Z side). In the embodiment, the light source 1 includes an optical member 16. The optical member 16 is disposed between the light-emitting surface 11 of the light source 1 and the first lens 2. The optical member 16 transmits light from the light-emitting surface 11. The transmittance of the optical member 16 for light from the light-emitting surface 11 is preferably 60% or more. The optical member 16 is preferably made of glass, but may be made of a material including glass, resin, etc. In the present embodiment, the optical member 16 includes a contact portion 160 against which the first lens 2 contacts. That is, the light source 1 includes a contact portion 160 against which the first lens 2 contacts. The contact portion 160 is a surface of the optical member 16 that faces the first lens 2.

[0016] Abutment refers to a state in which objects are in contact with each other. In this specification and claims, the objects correspond to the light source 1 and the first lens 2. The state in which the light source 1 and the first lens 2 are in contact with each other means that the light source 1 and the first lens 2 are in contact with each other. In addition, in this specification and claims, abutment includes a case in which a film or the like is interposed between the objects and the objects are not in direct contact with each other. Specifically, when the stress caused by the deformation of the first lens 2 is applied to the light source 1, it can be said that the first lens 2 and the light source 1 are in a relationship of "abutment" and "abutted". In other words, even when the light source 1 and the first lens 2 are in contact with each other through a film, in this embodiment, it can be said that the light source 1 and the first lens 2 are in contact with each other.

[0017] The light source 1 may not include the optical member 16. When the light source 1 does not include the optical member 16, for example, the light emitting surface 11 becomes the abutted part. However, since the light emitting surface 11 generates heat as it emits light, it is preferable that the light source 1 includes the optical member 16 in consideration of the effect of heat on the first lens 2 abutting the abutted part. By including the optical member 16 in the light source 1 and the abutted part 160 in the optical member 16, it is possible to prevent the heat generated from the light emitting surface 11 as the light source 1 emits light from being directly transmitted to the first lens 2. This makes it possible to reduce deterioration or damage caused by heat of the first lens 2 abutting the abutted part 160. In addition, by dissipating the heat from the light source 1 through the optical member 16 and the first lens 2 abutting the optical member 16, it is possible to expect an effect of improving the heat dissipation of the entire light source 1.

[0018] The first lens 2 is located above (on the +Z side of) the light source 1. The first lens 2 is supported by a housing 4 via a drive unit 3. The first lens 2 is moved by the drive unit 3, so that the position of the first lens 2 in the up-down direction (Z direction) relative to the light source 1 can be changed. The first lens 2 transmits light from the light source 1.

[0019] 2, the first lens 2 includes a first portion 21 and a second portion 22. The first portion 21 is a portion that comes into contact with abutment portion 160 of the light source 1. When the first lens 2 is moved by the driving unit 3, the position of the first lens 2 in the vertical direction (Z direction) relative to the light source 1 changes, and the first portion 21 can come into contact with the abutment portion 160.

[0020] 2, a first air layer 25 is interposed between contact portion 160 of light source 1 and first portion 21 of first lens 2. In other words, first portion 21 is not in contact with contact portion 160. The operation in which first lens 2 moves from the state in FIG. 2 and first portion 21 comes into contact with contact portion 160 will be described later with reference to FIGS. 8A and 8B.

[0021] The first portion 21, which is a part of the first lens 2, is elastically deformable by abutting against the abutment portion 160. Meanwhile, the second portion 22, which is another part of the first lens 2, may have a higher hardness than the first portion 21. In other words, the second portion 22 may be less susceptible to elastic deformation than the first portion 21. Furthermore, the first lens 2 may include an adhesive member 23 that is disposed between the first portion 21 and the second portion 22 and bonds the first portion 21 and the second portion 22 together.

[0022] The shape of the first portion 21 is preferably a convex shape that is convex toward the light source side so that it can be elastically deformed by abutting against the abutted portion 160. The convex surface may be spherical or aspherical. In particular, in consideration of light controllability, an aspherical surface constituted by a free-form surface is preferable. Furthermore, the first portion 21 may have a partially flat surface or concave surface in the region that abuts against the abutted portion 160.

[0023] When the first lens 2 includes the first portion 21 and the second portion 22, it is preferable that at least the second portion 22 is connected to the driving unit 3. Since the second portion 22 is not easily elastically deformed, the first lens 2 can be stably supported and moved by connecting the second portion 22 to the driving unit 3. However, the first lens 2 may include the second portion 22 or may not include the second portion 22. That is, the entire first lens 2 may be composed of the first portion 21 that is elastically deformable. In other words, it is sufficient that at least a part of the first lens 2 is elastically deformable. Here, the first lens includes the first portion 21 and the second portion 22, and each of the first portion 21 and the second portion 22 is connected to the driving unit 3 and supported by the housing 4 via the driving unit 3.

[0024] As an example, the first portion 21 may include a silicone resin, and the second portion 22 may include a material having a higher hardness than the silicone resin. As a material having a higher hardness than the silicone resin, an epoxy resin, a polycarbonate resin, or the like may be used. The first portion 21 and the second portion 22 may each include a silicone resin having a different hardness. The first portion 21 and the second portion 22 are bonded together, for example, by using an adhesive member 23. The adhesive member 23 can bond the first portion 21 and the second portion 22 together, and may be a resin having translucency. The first portion 21 and the second portion 22 may be in direct contact with each other without using the adhesive member 23. The first lens 2 in which the first portion 21 and the second portion 22 are in direct contact with each other may be formed, for example, by two-step molding.

[0025] The driving unit 3 moves the first lens 2 in a direction along the optical axis 20 of the first lens 2. In the light emitting module 100, the movement of the first lens 2 by the driving unit 3 changes the state of the first lens 2 with respect to the abutment portion 160 of the light source 1. Specifically, the state of the first lens 2 with respect to the abutment portion 160 of the light source 1 changes to include a case where an air layer is interposed between the light source 1 and the first lens 2 and the first lens 2 does not elastically deform, and a case where the first lens 2 abuts against the light source 1 and elastically deforms.

[0026] For example, the driving unit 3 can move the first lens 2 in a direction along the optical axis 20 of the first lens 2 in response to an operation input signal from an operation unit of the imaging device or the like. Alternatively, the light-emitting module 100 may have a control unit that controls the operation of the driving unit 3. The driving unit 3 can move the first lens 2 in a direction along the optical axis 20 of the first lens 2 in response to a control signal from the control unit. The driving method of the driving unit 3 may be electromagnetic, piezoelectric, ultrasonic, or the like.

[0027] The housing 4 is fixed to the upper surface of the mounting board 5 by an adhesive member or the like. The light source 1, the first lens 2, and the driving unit 3 are housed inside a box-shaped member formed by the housing 4 and the mounting board 5. The housing 4 can be made of a material such as a resin material, a metal material, or the like.

[0028] The housing 4 has an opening 41. The opening 41 has a substantially rectangular shape when viewed from above. However, the shape of the opening 41 may be substantially circular, substantially polygonal, or the like. The opening 41 is disposed so that the optical axis 20 of the first lens 2 is located at the opening 41 when viewed from above. After transmitting through the first lens 2, the light emitted from the light source 1 passes through the opening 41 and is irradiated onto an irradiated area above the light-emitting module 100. Note that in order to prevent the inside of the housing 4 from being exposed to the outside, a translucent plate-like member or the like that transmits light from the light-emitting surface 11 may be disposed in the opening 41.

[0029] <Example of light source 1 configuration> The light source 1 includes a light emitting element 12. The light emitting element 12 is a semiconductor light emitting element such as an LED (Light Emitting Diode) or an LD (Laser Diode). The light source 1 may use only the light emitting element 12. Alternatively, the light source 1 may use a light emitting device including the light emitting element 12 and other members. The light source 1 may also use a light emitting device including a plurality of light emitting elements. FIG. 3 is a cross-sectional view showing an example of the configuration of the light source 1. The cross-sectional view of FIG. 3 shows a cross section of the light source 1 taken along line II-II in FIG. 1. In the example shown in FIG. 3, the light source 1 includes the light emitting element 12, a light-transmitting member 14, a covering member 15, and an optical member 16. Here, the surface of the light-transmitting member 14 opposite to the surface facing the light emitting element 12 constitutes the light emitting surface 11 of the light source 1. The surface of the optical member 16 opposite to the surface facing the light-transmitting member 14 serves as the abutted portion of the light source 1 and abuts against the first lens. In addition, when only a light-emitting element is used as the light source 1, it is preferable that the light-emitting element has positive and negative electrodes on the same surface. The surface opposite to the surface having the positive and negative electrodes serves as the light-emitting surface 11 of the light source 1 and abuts against the first lens 2 as the abutted portion 160 of the light source 1. The light source 1 mainly emits light from the light-emitting surface 11 toward the first lens 2 provided on the +Z side of the light source 1. The light-emitting surface 11 refers to the main light extraction surface of the light source 1. The light emitted by the light source 1 may be multi-color light such as white light or amber light, or may be monochromatic light such as blue light, red light, or green light. The wavelength and chromaticity of the light emitted by the light source 1 may be appropriately selected depending on the use of the light-emitting module 100.

[0030] The light source 1 is placed on the +Z side surface of the mounting substrate 5, with the +Z side surface being the light emitting surface 11 and the surface opposite to the light emitting surface 11 being the mounting surface. The light source 1 includes a light emitting element 12, a translucent member 14 provided on the +Z side surface of the light emitting element 12, a covering member 15 covering the side surfaces of the light emitting element 12 and the translucent member 14 except for the +Z side surface of the translucent member 14, and an optical member 16 provided on the +Z side surface of the translucent member 14.

[0031] The light emitting element 12 includes at least a semiconductor structure. The semiconductor structure includes an n-side semiconductor layer, a p-side semiconductor layer, and an active layer sandwiched between the n-side semiconductor layer and the p-side semiconductor layer. The active layer may have a single quantum well (SQW) structure or a multiple quantum well (MQW) structure including multiple well layers. The semiconductor structure includes multiple semiconductor layers made of nitride semiconductors. The nitride semiconductors include In x Al y Ga 1-x-y The term includes semiconductors of all compositions in which the composition ratios x and y in the chemical formula N (0≦x, 0≦y, x+y≦1) are changed within the respective ranges. The emission peak wavelength of the active layer can be appropriately selected depending on the purpose. The active layer is configured to be capable of emitting, for example, visible light or ultraviolet light.

[0032] The semiconductor structure may include a plurality of light emitting regions including an n-side semiconductor layer, an active layer, and a p-side semiconductor layer. When the semiconductor structure includes a plurality of light emitting regions, each light emitting region may include well layers having different emission peak wavelengths, or may include well layers having the same emission peak wavelength. The same emission peak wavelength includes a case where the emission peak wavelengths vary by about several nm. The combination of emission peak wavelengths of the plurality of light emitting regions may be appropriately selected. For example, when the semiconductor structure includes two light emitting regions, the combination of light emitted by each light emitting region may be blue light and blue light, green light and green light, red light and red light, ultraviolet light and ultraviolet light, blue light and green light, blue light and red light, or green light and red light. For example, when the semiconductor structure includes three light emitting regions, the combination of light emitted by each light emitting region may be blue light, green light, and red light. Each light emitting region may include one or more well layers having emission peak wavelengths different from other well layers.

[0033] The light emitting element 12 may include a support substrate that supports the semiconductor laminate. When the light emitting element 12 includes a support substrate, it is preferable that at least a pair of positive and negative electrodes 13 (e.g., a p-side electrode and an n-side electrode) are disposed on the semiconductor laminate. This allows the surface of the support substrate opposite to the surface on which the semiconductor structure is disposed to serve as the light emitting surface 11 of the light emitting element 12. Examples of the support substrate include insulating substrates such as sapphire and spinel (MgAl2O4), and nitride-based semiconductor substrates such as gallium nitride. Note that in order to extract the light emitted from the active layer through the support substrate, it is preferable to use a material having translucency for the support substrate.

[0034] In this embodiment, the outer shape of the light-emitting surface 11 when viewed from above is substantially rectangular. However, the outer shape of the light-emitting surface 11 when viewed from above may be substantially circular or elliptical, or may be a polygon such as substantially triangular or substantially hexagonal.

[0035] The light-transmitting member 14 is a member having, for example, a substantially rectangular outer shape in a top view. The light-transmitting member 14 is provided so as to cover the upper surface of the light-emitting element 12. The light-transmitting member 14 can be formed using a light-transmitting resin material or an inorganic material such as ceramics or glass. As the resin material, a thermosetting resin such as a silicone resin, a silicone-modified resin, an epoxy resin, an epoxy-modified resin, or a phenolic resin can be used. In particular, a silicone resin or a modified resin thereof having excellent light resistance and heat resistance is preferable. Note that the light-transmitting property here preferably means that 60% or more of the light from the light-emitting element 12 is transmitted. In addition, the light-transmitting member 14 can be a thermoplastic resin such as a polycarbonate resin, an acrylic resin, a methylpentene resin, or a polynorbornene resin. Furthermore, the light-transmitting member 14 may contain a light diffusing material or a wavelength conversion material that converts the wavelength of at least a part of the light from the light-emitting element 12 in the above-mentioned resin. For example, the light-transmitting member 14 may be a resin material, ceramics, glass, or the like containing a wavelength converting substance, a sintered body of a wavelength converting substance, etc. The light-transmitting member 14 may be a multi-layered member in which a resin layer containing a wavelength converting substance or a light diffusing substance is disposed on the ±Z side surfaces of a molded body of resin, ceramics, glass, or the like.

[0036] The wavelength conversion material contained in the light-transmitting member 14 is, for example, an yttrium-aluminum-garnet phosphor (e.g., (Y,Gd)3(Al,Ga)5O 12 :Ce), lutetium aluminum garnet phosphors (e.g., Lu3(Al,Ga)5O 12 :Ce), terbium aluminum garnet phosphors (e.g., Tb3(Al,Ga)5O 12 :Ce), CCA phosphors (e.g., Ca 10 (PO4)6Cl2:Eu), SAE phosphors (e.g., Sr4Al 14 O 25 :Eu), chlorosilicate phosphors (e.g., Ca8MgSi4O 16(Cl2:Eu), silicate phosphors (e.g., (Ba,Sr,Ca,Mg)2SiO4:Eu), β-sialon phosphors (e.g., (Si,Al)3(O,N)4:Eu) or α-sialon phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 :Eu), etc. oxynitride phosphors, LSN phosphors (e.g., (La,Y)3Si6N 11 :Ce), BSESN phosphors (e.g., (Ba,Sr)2Si5N8:Eu), SLA phosphors (e.g., SrLiAl3N4:Eu), CASN phosphors (e.g., CaAlSiN3:Eu) or SCASN phosphors (e.g., (Sr,Ca)AlSiN3:Eu), etc. nitride phosphors, KSF phosphors (e.g., K2SiF6:Mn), KSAF phosphors (e.g., K2(Si 1-x Al x )F 6-x :Mn where x satisfies 0 < x < 1.), or fluoride phosphors such as MGF phosphors (e.g., 3.5MgO·0.5MgF2·GeO2:Mn), quantum dots having a perovskite structure (e.g., (Cs,FA,MA)(Pb,Sn)(F,Cl,Br,I)3 where FA and MA represent formamidinium and methylammonium, respectively.), II-VI group quantum dots (e.g., CdSe), III-V group quantum dots (e.g., InP), or quantum dots having a chalcopyrite structure (e.g., (Ag,Cu)(In,Ga)(S,Se)2), etc. can be used. The above phosphors are particles. Also, one of these wavelength conversion materials can be used alone, or two or more of these wavelength conversion materials can be used in combination.

[0037] In an embodiment, the light emitting module 100 uses a blue light emitting element as the light emitting element 12, and the translucent member 14 emits white light by including a wavelength conversion material that wavelength-converts the light emitted from the light emitting element 12 to yellow. As the light diffusing material contained in the translucent member 14, for example, titanium oxide, barium titanate, aluminum oxide, silicon oxide, etc. can be used.

[0038] The covering member 15 is a member that covers the side surfaces of the light-emitting element 12 and the light-transmitting member 14. The covering member 15 directly or indirectly covers the side surfaces of the light-emitting element 12 and the light-transmitting member 14. The upper surface of the light-transmitting member 14 is exposed from the covering member 15. The upper surface of the light-transmitting member 14 is the light-emitting surface 11 of the light source 1.

[0039] In the light emitting module 100, the light source 1 may have a plurality of light emitting surfaces 11. For example, the light source 1 may have a plurality of light emitting sections each having a light emitting surface 11. The plurality of light emitting sections are, for example, a plurality of light emitting elements 12, or a plurality of light emitting elements 12 and a light transmissive member 14 covering each of the plurality of light emitting elements 12. When the light source 1 includes a plurality of light emitting sections, the covering member 15 may be continuous between adjacent light emitting sections among the plurality of light emitting sections, or may be spaced apart. The covering member 15 is preferably made of a member having a high light reflectance in order to improve the light extraction efficiency. For example, a resin material containing a light reflective substance such as a white pigment can be used as the covering member 15.

[0040] Examples of the light-reflecting material include titanium oxide, zinc oxide, magnesium oxide, magnesium carbonate, magnesium hydroxide, calcium carbonate, calcium hydroxide, calcium silicate, magnesium silicate, barium titanate, barium sulfate, aluminum hydroxide, aluminum oxide, zirconium oxide, and silicon oxide. It is preferable to use one of these materials alone or two or more of these materials in combination. In addition, it is preferable to use a resin material containing a thermosetting resin such as an epoxy resin, an epoxy-modified resin, a silicone resin, a silicone-modified resin, or a phenolic resin as a base material for the resin material. In addition to or in place of the light-reflecting material, the covering member 15 may contain a wavelength conversion material or a pigment for adjusting the color tone of the light emitted from the light source 1. The covering member 15 may be made of a material that is translucent to visible light as necessary. The covering member 15 may be made of a material that contains a light-absorbing material such as carbon black, graphite, or a titanium-based black pigment.

[0041] The light source 1 is electrically connected to the wiring 51 provided on the mounting substrate 5. The mounting substrate 5 preferably includes the wiring 51 arranged at least on the surface. The light source 1 and the mounting substrate 5 are electrically connected by connecting the wiring 51 of the mounting substrate 5 to at least a pair of positive and negative electrodes 13 of the light source 1 via a conductive adhesive member 52. The configuration, size, etc. of the wiring 51 of the mounting substrate 5 are set according to the configuration and size of the electrodes 13 of the light source 1. The wiring 51 of the mounting substrate 5 may be arranged inside the mounting substrate.

[0042] The mounting substrate 5 preferably uses an insulating material as a base material, and preferably uses a material that is difficult to transmit light emitted from the light source 1 and external light, and preferably uses a material having a certain strength. Specifically, the mounting substrate 5 can be configured using ceramics such as alumina, aluminum nitride, mullite, and silicon nitride, and resins such as phenol resin, epoxy resin, polyimide resin, BT resin (bismaleimide triazine resin), and polyphthalamide as a base material.

[0043] The wiring 51 can be made of at least one of copper, iron, nickel, tungsten, chromium, aluminum, silver, gold, titanium, palladium, rhodium, alloys of these, etc. Furthermore, a layer of silver, platinum, aluminum, rhodium, gold, alloys of these, etc. may be provided on the surface layer of the wiring 51 from the viewpoint of wettability and / or light reflectivity of the conductive adhesive member 52.

[0044] <Modification of Light Source 1> Modified examples of the light source 1 will be described with reference to Figs. 4 to 7. Note that the same names and symbols as those in the already described embodiments and modifications indicate the same or similar components, and detailed description will be omitted as appropriate. This also applies to the embodiments and modifications described below. Also, the modified examples of the light source 1 here are not limited to modified examples of the light source in the first embodiment, but may also be modified examples of the light source in each of the second to fourth embodiments described below.

[0045] (First Modification of Light Source 1) 4 is a cross-sectional view showing a schematic example of the configuration of a light source 1a according to a first modified example. The light source 1a has a light-transmitting member 14a and a covering member 15a. The configuration of the light source 1a other than the light-transmitting member 14a and the covering member 15a may be the same as the configuration of the light source 1. The light-transmitting member 14a is provided on the +Z side surface of the light-emitting element 12. The covering member 15a covers the side surface of the light-emitting element 12 except for the +Z side surface of the light-emitting element 12. The light-transmitting member 14a covers the +Z side surface of the covering member 15a.

[0046] (Second Modification of Light Source 1) FIG. 5 is a cross-sectional view showing a schematic example of the configuration of the light source 1b according to the second modified example. The light source 1b has a light diffusion member 17 disposed between the light-transmitting member 14a and the optical member 16. The configuration of the light source 1b other than the light diffusion member 17 may be the same as that of the light source 1a. The light diffusion member 17 is provided on the surface on the +Z side of the light-transmitting member 14a. The light diffusion member 17 is a plate-like member containing titanium oxide, barium titanate, aluminum oxide, silicon oxide, or the like. The light diffusion member 17 diffuses the light from the light-transmitting member 14a. The light diffused by the light diffusion member 17 passes through the optical member 16, then passes through the first lens 2, and is then irradiated onto the irradiated area.

[0047] (Third Modification of Light Source 1) FIG. 6 is a cross-sectional view showing a schematic example of the configuration of a light source 1c according to a third modified example. The light source 1c may or may not include an optical member. The light source 1c includes a plurality of light-emitting elements 12 and a plurality of light-transmitting members 14. The light-emitting elements 12 and the light-transmitting members 14 respectively constitute the light source 1-1c, the light source 1-2c, the light source 1-3c, the light source 1-4c, and the light source 1-5c as a plurality of light-emitting sections of the light source 1c. The covering member 15c is disposed between adjacent light-emitting sections of the light source 1-1c, the light source 1-2c, the light source 1-3c, the light source 1-4c, and the light source 1-5c. The covering member 15c covers the side surfaces of the light diffusion member 17, the light-transmitting member 14, and the light-emitting element 12, except for the surface on the +Z side of the light diffusion member 17. The light source 1-1c, the light source 1-2c, the light source 1-3c, the light source 1-4c, and the light source 1-5c are an example of a plurality of light sources aligned in the X direction. The X direction is an example of a first direction.

[0048] The light source 1c includes the light source 1-1c, the light source 1-2c, the light source 1-3c, the light source 1-4c, and the light source 1-5c, a covering member 15c, a light diffusion member 17, and an electrode 13. The electrode 13 of the light source 1c may be the electrode 13 of the light emitting element 12 exposed from the covering member 15c, or may be another metal member that covers the electrode 13 of the light emitting element 12 exposed from the covering member 15c. The light source 1-1c, the light source 1-2c, the light source 1-3c, the light source 1-4c, and the light source 1-5c may each have the same configuration. For this reason, in FIG. 6, only the light source 1-1c is given a reference symbol as a representative. The light-transmitting member 14 is provided on the surface of the light emitting element 12 on the +Z side. The light-diffusing member 17 is provided on the surface of the light emitting element 12 on the +Z side. The electrode 13 is at least a pair of positive and negative electrodes provided on the surface of the light emitting element 12 opposite to the light emitting surface 11.

[0049] The number of light sources included in the light source 1c is not limited to five, and may be any number. The light sources may be aligned in the Y direction. The light sources may be aligned in both the X direction and the Y direction. The Y direction is an example of a second direction perpendicular to the first direction.

[0050] (Fourth Modification of Light Source 1) FIG. 7 is a cross-sectional view showing a schematic example of the configuration of a light source 1d according to a fourth modified example. The light source 1d may or may not include an optical member. The light source 1d includes a plurality of light-emitting elements 12 and a plurality of light-transmitting members 14. The light-emitting elements 12 and the light-transmitting members 14 respectively constitute the light source 1-1d, the light source 1-2d, the light source 1-3d, the light source 1-4d, and the light source 1-5d as a plurality of light-emitting units of the light source 1d. The covering member 15d is disposed between adjacent light sources in the light source 1-1d, the light source 1-2d, the light source 1-3d, the light source 1-4d, and the light source 1-5d. The covering member 15d covers the side surfaces of the light-transmitting member 14 and the light-emitting element 12, except for the surface on the +Z side of the light-transmitting member 14. The light source 1-1d, the light source 1-2d, the light source 1-3d, the light source 1-4d, and the light source 1-5d are examples of a plurality of light sources aligned in the X direction. The light diffusion member 17d is provided on the +Z side surfaces of the light sources 1-1d, 1-2d, 1-3d, 1-4d, and 1-5d, and on the +Z side surface of the covering member 15d. In other words, the light diffusion member 17d continuously covers the +Z side surfaces of the multiple light-transmitting members 14 and the covering member 15d disposed between the light-transmitting members.

[0051] The light source 1d includes the light source 1-1d, the light source 1-2d, the light source 1-3d, the light source 1-4d, and the light source 1-5d, a covering member 15d, a light diffusion member 17d, and an electrode 13. The electrode 13 of the light source 1d may be the electrode 13 of the light emitting element 12 exposed from the covering member 15d, or may be another metal member that covers the electrode 13 of the light emitting element 12 exposed from the covering member 15d. The light source 1-1d, the light source 1-2d, the light source 1-3d, the light source 1-4d, and the light source 1-5d may each have the same configuration. For this reason, in FIG. 7, only the light source 1-1d is given a symbol as a representative. The light-transmitting member 14 is provided on the surface of the light emitting element 12 on the +Z side. The electrode 13 is at least a pair of positive and negative electrodes provided on the surface of the light emitting element 12 opposite to the light emitting surface 11.

[0052] The number of light sources included in the light source 1d is not limited to five and may be any number. In addition, the light sources may be aligned in the Y direction, or in both the X and Y directions.

[0053] (Other Modifications of Light Source 1) The light source 1 may be composed of a light-emitting element 12 and a pair of electrodes 13. The light source 1 may also be composed of a light-emitting element 12, a light-transmitting member 14, and a pair of electrodes 13. The light source 1 may also be composed of a light-emitting element 12, a light-transmitting member 14, a light diffusing member 17, and a pair of electrodes 13.

[0054] The light source 1 may have a plurality of light sources aligned in the X direction, the Y direction, or both the X direction and the Y direction. Each of the plurality of light sources may be composed of a light emitting element 12 and a pair of electrodes 13. Each of the plurality of light sources may be composed of a light emitting element 12, a light transmissive member 14, and a pair of electrodes 13. Each of the plurality of light sources may be composed of a light emitting element 12, a light transmissive member 14, a light diffusing member 17, and a pair of electrodes 13.

[0055] <Example of change in state of first lens 2> The state change of the first lens 2 will be described with reference to Figs. 8A to 9B. Figs. 8A and 8B are diagrams that typically show an example of the state change of the first lens 2 in the light emitting module 100. Fig. 8A is a cross-sectional view of the light emitting module 100 showing the state before the state change of the first lens 2, and Fig. 8B is a cross-sectional view of the light emitting module 100 showing the state after the state change of the first lens 2. Fig. 9A is a diagram showing an example of the irradiated light in the state of Fig. 8A. Fig. 9B is a diagram showing an example of the irradiated light in the state of Fig. 8B. Note that Figs. 8A before the state change and Fig. 8B after the state change are merely examples, and the state before the state change may be the state of Fig. 8B, and the state after the state change may be the state of Fig. 8A. This point is also true in the cases below in which the state before the state change of the first lens and the state after the state change are shown. Note that in Figs. 8A and 8B, the actual irradiated light is refracted at the interface between the first portion 21 and the second portion 22 and the interface between the second portion and the air, but for simplicity, the refraction is not shown.

[0056] In Fig. 8A, a first air layer 25 is interposed between abutment portion 160 of light source 1 and first lens 2. That is, in the state of Fig. 8A, light source 1 and first lens 2 are separated from each other, and first air layer 25 is present between abutment portion 160 and first lens 2. In the state of Fig. 8A, abutment portion 160 and first lens 2 are not in contact with each other, and no external force that would elastically deform first lens 2 is applied to first lens 2, so that first lens 2 does not elastically deform.

[0057] The length t is the length from the lower surface of the mounting substrate 5 to the upper surface of the first lens 2 in the Z direction of the light emitting module 100. The first irradiation angle θ1 represents the irradiation angle of the light irradiated from the light emitting module 100 in the state of FIG. 8A. Here, the first irradiation angle θ1 is described as the maximum irradiation angle of the light irradiated from the light emitting module 100. The maximum irradiation angle is the angle formed by a line parallel to the line connecting the center position of the light emitting surface and the central illuminance position of the irradiated light in the irradiated area, and a line connecting the emission position from the first lens 2 of the light emitted from a position on the approximate end of the light emitting surface and the 1 / 2 illuminance position of the irradiated light in the irradiated area. The emission position corresponds to the emission position of the light on the outermost edge of the light flux emitted from the first lens 2. The 1 / 2 illuminance position is the position where the illuminance is approximately 1 / 2 of the central illuminance of the irradiated light. However, the 1 / 2 illuminance position may be a position having any other illuminance, such as a position where the illuminance is approximately 1 / 10 of the central illuminance of the irradiation light.

[0058] 8A, light L0 from light source 1 passes through first air layer 25 and enters first portion 21 of first lens 2, then passes through the inside of first lens 2 and is irradiated toward an irradiated area on the +Z side of first lens 2. Since light L0 passes through first air layer 25, it passes through two optical interfaces before entering first lens 2. At this time, light L0 is refracted at each of the interface between optical member 16 and first air layer 25, and the interface between first air layer 25 and first lens 2. In other words, light L0 is refracted twice before entering first lens 2.

[0059] 9A indicates an area irradiated with light L0 from light emitting module 100. Irradiated light 210-1 corresponds to the illuminance distribution of light L0 irradiated onto irradiated area 200.

[0060] 8B shows a state in which the first lens 2 is moved in the -Z direction along the optical axis 20 by the driving unit 3 of FIG. 2 from the state in FIG. 8A, and the first portion 21 is in contact with the abutment portion 160. In the state in FIG. 8B, the first portion 21 is in contact with the abutment portion 160, and therefore the first air layer 25 is reduced between the abutment portion 160 and the first lens 2, as compared with the state in FIG. 8A in which the first air layer 25 is present. That is, in the light-emitting module 100, the state of the first lens 2 with respect to the abutment portion 160 may include a state in which the first air layer 25 is present between the abutment portion 160 and the first lens 2, and a state in which the first air layer 25 is reduced, in addition to the state in FIG. 8A. The first portion 21 of the first lens 2 is in contact with the abutment portion 160, and an external force in the +Z direction is applied from the abutment portion 160. The first portion 21 is elastically deformed so as to contract in the Z direction in response to this external force.

[0061] The state in which first air layer 25 is reduced includes a state in which no first air layer exists between contact portion 160 and first lens 2, and a state in which a first air layer exists partially on the contact surface between contact portion 160 and first lens 2. The partial existence of a first air layer means, for example, a state in which an air layer exists due to the surface shape, surface roughness, etc. of contact portion 160 and first lens 2 in a state in which first portion 21 of first lens 2 abuts against contact portion 160.

[0062] The amount of change Δt represents the amount of change in length associated with the movement of first lens 2 toward contact portion 160 and the amount of change in length associated with elastic deformation of first lens 2. The length t from the lower surface of mounting substrate 5 to the upper surface of first lens 2 in light emitting module 100 is shorter by the amount of change Δt compared to when first lens 2 is not in contact with contact portion 160. The second irradiation angle θ2 represents the maximum irradiation angle of light irradiated from light emitting module 100 in the state shown in FIG. 8B. In the examples of FIGS. 8A and 8B, the second irradiation angle θ2 is greater than the first irradiation angle θ1.

[0063] In the state of FIG. 8B, the light L1 from the light source 1 can be directly incident on the first lens 2 from the optical member 16 without passing through an air layer. The light L1 then passes through the inside of the first lens 2 and is irradiated toward the irradiated area on the +Z side of the first lens 2. When the light L1 is directly incident on the first lens 2 from the optical member 16 without passing through an air layer, the light L1 passes through one optical interface before entering the first lens 2. At this time, the light L1 is refracted only at the interface between the optical member 16 and the first lens 2. That is, the light L1 is refracted once before entering the first lens 2. In addition, the surface of the first lens 2 that abuts against the abutment portion 160 becomes almost flat following the shape of the abutment portion 160. Therefore, unlike the case where the first lens 2 is not abutting against the optical member 16, the light L1 is hardly affected by the curvature of the surface of the first lens 2. As a result, the distribution of the light emitted from light-emitting module 100 in the state of FIG. 8B differs from the distribution of the light emitted from light-emitting module 100 in FIG. 8A.

[0064] The illuminated region 200 in FIG. 9B indicates a region illuminated with light L1 from the light emitting module 100. Irradiated light 210-2 corresponds to the illuminance distribution of the light L1 illuminated to the illuminated region 200. In the state of FIG. 9B, as an example, the light L1 is refracted once, and the surface of the first lens 2 is substantially flat, so that the second illumination angle θ2 of the illuminated light acts to be larger than the first illumination angle θ1. As a result, as shown in FIG. 9B, the light emitting module 100 can change the light distribution of the illuminated light so that the region of the illuminated light 210-2 in the illuminated region 200 is wider than the region of the illuminated light 210-1 in FIG. 9A.

[0065] For example, even when the first lens 2 is moved in the direction along the optical axis 20 in a state where the first lens 2 is not in contact with the light source 1, the distance between the first lens 2 and the light source 1 changes in response to the movement of the first lens 2. It is also possible to change the light distribution of the light emitted from the light emitting module 100 in response to this change in distance. For example, the first lens 2 may be moved in the +Z direction from a state where the first lens 2 is closest to the light source 1 without being in contact with the light source 1. However, in this case, the sum of the length from the lower surface of the mounting substrate 5 to the upper surface of the first lens 2 when the first lens 2 is closest to the light source 1 and the amount of movement of the first lens 2 in the +Z direction is required as at least the thickness of the light emitting module 100, i.e., the length of the light emitting module 100 in the direction along the optical axis 20.

[0066] In this embodiment, the state of the first lens 2 relative to the abutted portion 160 changes due to the movement of the first lens 2. For example, the first lens 2 abuts against the abutted portion 160, and the first lens 2 elastically deforms so as to contract in the direction of the optical axis 20, thereby changing the state of the first lens 2 relative to the abutted portion 160. The light emitting module 100 can change the light distribution of the irradiated light due to this state change. In this embodiment, since it is not necessary to ensure a thickness of the light emitting module 100 corresponding to the length by which the first lens 2 is moved in order to change the light distribution of the irradiated light, the light emitting module 100 can be made thin. As described above, in this embodiment, it is possible to provide a light emitting module 100 that can be made thin.

[0067] Furthermore, in this embodiment, the state of the first lens 2 with respect to the abutment portion 160 may include a state in which the first air layer 25 is present between the abutment portion 160 and the first lens 2, and a state in which the first air layer 25 is reduced. As a result, compared to the case in which the first lens 2 is moved in the direction of the optical axis 20 only in the state in which the first air layer 25 is reduced between the abutment portion 160 and the first lens 2, the light distribution can be significantly changed depending on the presence or absence of refraction at the interface between the first air layer 25 and the first lens 2. That is, in the light-emitting module 100 that can be made thin, the light distribution can be significantly changed, and a desired light distribution can be realized.

[0068] Furthermore, in this embodiment, the state of the first lens 2 with respect to the abutted portion 160 may include a state in which the first lens 2 is in contact with only a partial area of ​​the abutted portion 160. In this state, the light incident on the first lens 2 from the light source 1 includes both light L0 that passes through the air layer and two optical interfaces, and light L1 that passes through one optical interface without passing through an air layer. This makes it possible to realize a desired light distribution.

[0069] 8A and 8B. For example, if the hardness of the abutted portion 160 is similar to or lower than the hardness of the first portion 21, the first portion 21 and the abutted portion 160 may each be deformed when the first portion 21 abuts against the abutted portion 160. Since the way in which light is refracted differs depending on whether the first portion 21 or the abutted portion 160 is deformed, control of the refraction of light at the interface between the first portion 21 and the abutted portion 160 becomes complicated.

[0070] Furthermore, when a material that is not easily elastically deformed is used for the contact portion 160, there is a risk that the contact portion 160 may be damaged due to deformation of the contact portion 160. However, if the hardness of the contact portion 160 is approximately the same as or higher than the hardness of the first portion 21, damage to the contact portion 160 can be reduced.

[0071] When the hardness of the contact portion 160 is made higher than the hardness of the first portion 21, damage to the contact portion 160 can be reduced. In other words, the deformation when the first portion 21 contacts the contact portion 160 is mainly the deformation of the first portion 21, so that it becomes easier to control the refraction of light at the interface between the first portion 21 and the contact portion 160. As a result, the desired irradiation light can be easily obtained in the irradiated region 200.

[0072] <Modifications of the First Lens 2> 10A to 11B, modified examples of the first lens 2 will be described. Note that the modified examples of the first lens 2 here are not limited to modified examples of the first lens in the first embodiment, but may also be modified examples of the first lens in each of the second to fourth embodiments described below.

[0073] (First Modification of First Lens 2) 10A and 10B are diagrams illustrating a first lens 2e according to a first modified example and an example of a state change thereof. The light emitting module 100e has a first lens 2e. The configuration of the light emitting module 100e other than the first lens 2e may be the same as that of the light emitting module 100. FIG. 10A is a cross-sectional view of the light emitting module 100e showing the first lens 2e before the state change, and FIG. 10B is a cross-sectional view of the light emitting module 100e showing the first lens 2e after the state change.

[0074] 10A and 10B, first lens 2e has elastically deformable first portion 21 in contact with contact portion 160, and third portion 24 provided around first portion 21 in top view. Third portion 24 includes reflecting portion 241. Third portion 24 and reflecting portion 241 each have a substantially circular outer shape in top view. Reflecting portion 241 is disposed outside light-emitting surface 11 in top view.

[0075] In Fig. 10A, a first air layer 25 is interposed between the abutment portion 160 of the light source 1 and the first lens 2e. In the state of Fig. 10A, the abutment portion 160 and the first lens 2e are not in contact with each other. Therefore, no external force that would elastically deform the first lens 2e is applied to the first lens 2e, and therefore the first lens 2e does not elastically deform.

[0076] In the state of Fig. 10A, the light incident on the first portion 21 from the light source 1 behaves in a manner similar to the light L0 in Fig. 8A, passes through the inside of the first lens 2e, and is irradiated toward the irradiated area on the +Z side of the first lens 2e. Also, in Fig. 10A, of the light from the light-emitting surface 11, the light L2 incident on the third portion 24 passes through the inside of the third portion 24, reaches the reflecting portion 241, and is reflected by the reflecting portion 241. The reflection by the reflecting portion 241 is, for example, total reflection. The light L2 reflected by the reflecting portion 241 passes through the inside of the first lens 2e, and is then irradiated toward the irradiated area on the +Z side of the first lens 2e.

[0077] 10B shows a state in which first lens 2e has been moved in the -Z direction along optical axis 20 by drive unit 3 of FIG. 2 from the state in FIG. 10A, and first portion 21 has come into contact with abutment portion 160. When first portion 21 of first lens 2e comes into contact with abutment portion 160, an external force is applied from abutment portion 160 in the +Z direction. First portion 21 is elastically deformed so as to contract in the Z direction in response to this external force.

[0078] In the state of Fig. 10B, the light incident on the first portion 21 from the light source 1 behaves in substantially the same manner as the light L1 in Fig. 8B, passes through the inside of the first lens 2e, and is irradiated toward the irradiated area on the +Z side of the first lens 2e. The light distribution of the light irradiated from the light-emitting module 100e in the state of Fig. 10B differs from the light distribution of the light irradiated from the light-emitting module 100e in Fig. 10A.

[0079] In addition, in FIGS. 10A and 10B, the actual irradiated light is refracted at the interface between first portion 21 and second portion 22 and at the interface between the second portion and air, but for simplicity, the state of refraction is not shown.

[0080] In the light emitting module 100e, light L2 from the light emitting surface 11 that travels outside the first portion 21 of the first lens 2e and does not enter the first portion 21 can be reflected by the reflecting portion 241. Since the light L2 can be used for the distribution of the irradiation light from the light emitting module 100e, the light extraction efficiency of the light emitting module 100e can be improved.

[0081] (Second Modification of First Lens 2) 11A and 11B are diagrams showing a first lens 2f according to a second modified example and an example of a state change thereof. FIG. 11A is a cross-sectional view of the light emitting module 100f showing the state of the first lens 2f before the state change, and FIG. 11B is a cross-sectional view of the light emitting module 100f showing the state of the first lens 2f after the state change. The light emitting module 100f has a light source 1f having a plurality of light emitting units, and a first lens 2f having a plurality of lens units corresponding to the plurality of light emitting units. The configuration of the light emitting module 100f other than the light source 1f and the first lens 2f may be the same as the configuration of the light emitting module 100.

[0082] The light source 1f has a light source 1-1f, a light source 1-2f, and a light source 1-3f as a plurality of light-emitting units. The light source 1-1f, the light source 1-2f, and the light source 1-3f are examples of a plurality of light sources aligned in the X direction. The light source 1f may have a plurality of light sources aligned in the Y direction. The light source 1f may also have a plurality of light sources aligned in each of the X direction and the Y direction. Each of the light source 1-1f, the light source 1-2f, and the light source 1-3f may have the same configuration and function as the light source 1 described above.

[0083] The first lens 2f includes a first lens 2-1f, a first lens 2-2f, and a first lens 2-3f. The first lens 2-1f, the first lens 2-2f, and the first lens 2-3f are examples of a plurality of first lenses arranged in pairs with a plurality of light sources. The first lens 2f may include a plurality of first lenses aligned in the Y direction in accordance with the light source 1f. The first lens 2f may include a plurality of first lenses aligned in each of the X direction and the Y direction in accordance with the light source 1f. Each of the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f may have the same configuration and function as the first lens 2 described above.

[0084] The first lens 2-1f, the first lens 2-2f, and the first lens 2-3f are integrally formed. In other words, the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f are connected. The first lens 2-1f, the first lens 2-2f, and the first lens 2-3f are made of a material containing a resin material, and can be integrally formed by molding or the like.

[0085] In Fig. 11A, a first air layer 25 is interposed between the contact portion 160 of the optical member 16 of each of the light source 1-1f, the light source 1-2f, and the light source 1-3f and the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f. That is, in the state of Fig. 11A, the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f are not in contact with the contact portion 160. Therefore, since no external force is applied to elastically deform the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f, the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f, they do not elastically deform.

[0086] In the state of Fig. 11A, the light incident on the first portion 21 of the pair of first lenses 2-1f, 2-2f, and 2-3f from light source 1-1f, 1-2f, and 1-3f, respectively, behaves in a manner similar to light L0 in Fig. 8A. The light transmitted through the first lenses 2-1f, 2-2f, and 2-3f, respectively, is irradiated toward an illuminated area on the +Z side of first lens 2f.

[0087] 11B shows a state in which the first lens 2f has been moved in the -Z direction along the optical axis 20 by the driving unit 3 of FIG. 2 from the state in FIG. 11A, and the first portions 21 of the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f have come into contact with the abutment portion 160. By coming into contact with the abutment portion 160, an external force is applied from the abutment portion 160 toward the +Z direction to the first portions 21 of the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f. The first portions 21 of the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f are elastically deformed so as to contract in the Z direction in response to this external force.

[0088] In the state of FIG. 11B, the light incident on the first portion 21 of the pair of the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f from each of the light source 1-1f, the light source 1-2f, and the light source 1-3f behaves almost similarly to the light L1 in FIG. 11B. The light transmitted through the inside of each of the first lens 2-1f, the first lens 2-2f, and the first lens 2-3f is irradiated toward the irradiated area on the +Z side of the first lens 2f. The light distribution of the irradiated light from the light emitting module 100f in the state of FIG. 11B is different from the light distribution of the irradiated light from the light emitting module 100f in FIG. 11A. Note that in FIG. 11A and FIG. 11B, the actual irradiated light is refracted at the interface between the first portion 21 and the second portion 22 and the interface between the second portion and the air, but for simplicity, the refraction is not shown.

[0089] In the light emitting module 100f, a desired light distribution can be achieved by using a plurality of light sources and a plurality of first lenses.

[0090] [Second embodiment] <Example of light source 1g configuration> Next, a light emitting module according to the second embodiment will be described. Fig. 12 and Fig. 13 are diagrams showing an example of a light source 1g included in a light emitting module 100g according to the second embodiment. Fig. 12 is a top view showing the light source 1g in the light emitting module 100g, and Fig. 13 is a cross-sectional view taken along line XIII-XIII in Fig. 12. The configuration of the light emitting module 100g other than the light source 1g may be the same as the configuration of the light emitting module 100 described above.

[0091] As shown in FIG. 12 and FIG. 13, the light source 1g has a light emitting element 12, a light-transmitting member 14, a covering member 15, an optical member 16g, and a second air layer 18. The optical member 16g is disposed on the upper surface (+Z side surface) of the mounting substrate 5 so as to house the light emitting element 12, the light-transmitting member 14, and the covering member 15 inside. The second air layer 18 is located between the light emitting surface 11 and the optical member 16g in the direction along the optical axis 20 of the first lens 2 (see FIG. 2). The optical member 16g has a contacted portion 160 and an opposing surface 161 on the opposite side to the contacted portion. In the optical member 16g, the contacted portion 160 is the upper surface (+Z side surface) of the optical member 16g, and the opposing surface 161 is the lower surface (-Z side surface) of the optical member 16g, which faces the light emitting surface 11 via the second air layer 18.

[0092] In the light emitting module 100g, the light source 1g has a second air layer 18 between the light emitting element 12 and the optical member 16g, thereby reducing the transfer of heat caused by the light emitting element 12 from the light emitting surface 11 to the optical member 16. This reduces the transfer of heat from the light emitting surface 11, etc. to the first lens 2 abutting against the abutment portion 160, thereby reducing deterioration and damage to the first lens 2 due to heat. In addition, in the light emitting module 100g, the light source 1g has a second air layer 18, thereby reducing the force of the first lens 2 abutting against the abutment portion 160 being applied to the light emitting surface 11, etc. via the optical member 16g. This reduces damage and changes in the surface shape of the light emitting surface 11, etc. caused by the force of the first lens 2 abutting against the abutment portion 160.

[0093] <Modification of light source 1g> 14A to 16B, a modified example of the light source 1g will be described. Regarding the same configuration as the light source 1g described above, duplicated description will be omitted as appropriate.

[0094] (First modified example of light source 1g) 14A and 14B are diagrams illustrating a light source 1ga according to a first modified example of the light source 1g. The light emitting module 100ga has a light source 1ga. The configuration of the light emitting module 100ga other than the light source 1ga may be the same as that of the light emitting module 100. FIG. 14A is a cross-sectional view of the light emitting module 100ga showing the state before the first lens 2 changes, and FIG. 14B is a cross-sectional view of the light emitting module 100ga showing the state after the first lens 2 changes. As shown in FIG. 14A and FIG. 14B, the light source 1ga has an optical member 16ga.

[0095] Optical member 16ga is disposed on the upper surface of mounting substrate 5 so as to house light emitting element 12, light-transmitting member 14, and covering member 15 inside. In optical member 16ga, the surface facing light emitting surface 11 via second air layer 18 is Fresnel lens surface 161ga. A Fresnel lens surface is a lens surface that is thinned by dividing a curved surface such as a concave or convex surface into concentric regions. Fresnel lens surface 161ga is included in a portion of optical member 16ga opposite contact portion 160.

[0096] 14A, light from light-emitting surface 11 is refracted and reflected by Fresnel lens surface 161ga, passes through the inside of optical member 16ga, and then passes through contact portion 160 and first air layer 25 to enter first lens 2. The light that entered first lens 2 passes through the inside of first lens 2 and is irradiated towards the illuminated area on the +Z side of first lens 2.

[0097] 14B shows a state in which first lens 2 has been moved in the -Z direction along optical axis 20 by drive unit 3 of FIG. 2 from the state in FIG. 14A, and first portion 21 has come into contact with abutment portion 160. When first portion 21 of first lens 2 comes into contact with abutment portion 160, an external force is applied from abutment portion 160 in the +Z direction. First portion 21 is elastically deformed so as to contract in the Z direction in response to this external force.

[0098] 14B, light from light-emitting surface 11 is refracted and reflected by Fresnel lens surface 161ga, passes through the inside of optical member 16ga, and then passes through abutted portion 160 to enter first lens 2. The light that entered first lens 2 passes through the inside of first lens 2 and is irradiated toward an irradiated area on the +Z side of first lens 2. The light distribution of the light irradiated from light-emitting module 100ga in the state of FIG. 14B differs from the light distribution of the light irradiated from light-emitting module 100ga in FIG. 14A.

[0099] In the light-emitting module 100ga, the desired light distribution by the light-emitting module 100ga can be realized by controlling the shape and angle of the multiple concentric grooves that constitute the Fresnel lens surface 161ga. In addition, the Fresnel lens surface makes it difficult for the light-emitting surface 11 of the light source 1ga to be viewed from the outside, thereby improving the aesthetic appearance of the light-emitting module 100ga.

[0100] (Second modified example of light source 1g) 15A and 15B are diagrams illustrating a light source 1gb according to a second modified example of the light source 1g. The light emitting module 100gb has a light source 1gb. The configuration of the light emitting module 100gb other than the light source 1gb may be the same as the configuration of the light emitting module 100. FIG. 15A is a cross-sectional view of the light emitting module 100gb showing the state before the first lens 2 changes, and FIG. 15B is a cross-sectional view of the light emitting module 100gb showing the state after the first lens 2 changes. As shown in FIG. 15A and FIG. 15B, the light source 1gb has an optical member 16gb.

[0101] Optical member 16gb is disposed on the upper surface of mounting substrate 5 so as to accommodate light emitting element 12, light-transmitting member 14, and covering member 15 inside. In optical member 16gb, the surface facing light emitting surface 11 via second air layer 18 is convex surface 161gb that protrudes toward light emitting surface 11. Convex surface 161gb is included in a portion of optical member 16gb opposite to abutted portion 160.

[0102] 15A , light from light-emitting surface 11 is refracted by convex surface 161gb, passes through the inside of optical member 16gb, and then passes through abutment portion 160 and first air layer 25 to be incident on first lens 2. The light incident on first lens 2 passes through the inside of first lens 2 and is irradiated towards an irradiated area on the +Z side of first lens 2.

[0103] 15B shows a state in which first lens 2 has been moved in the -Z direction along optical axis 20 by drive unit 3 of FIG. 2 from the state in FIG. 15A, and first portion 21 has come into contact with abutment portion 160. When first portion 21 of first lens 2 comes into contact with abutment portion 160, an external force is applied from abutment portion 160 in the +Z direction. First portion 21 is elastically deformed so as to contract in the Z direction in response to this external force.

[0104] 15B, light from light-emitting surface 11 is refracted by convex surface 161gb, passes through the inside of optical member 16gb, and then passes through abutment portion 160 to enter first lens 2. The light that entered first lens 2 passes through the inside of first lens 2 and is irradiated toward an irradiated area on the +Z side of first lens 2. The light distribution of the light irradiated from light-emitting module 100gb in the state of FIG. 15B differs from the light distribution of the light irradiated from light-emitting module 100gb in FIG. 15A.

[0105] In the light emitting module 100gb, by controlling the shape of the convex surface 161gb, it is possible to realize a desired light distribution in the light emitting module 100gb. In addition, it is possible to improve the light extraction efficiency in the light emitting module 100gb. Furthermore, it is possible to improve the light collection ability of the light emitting module 100gb.

[0106] (Third modified example of light source 1g) 16A and 16B are diagrams illustrating a light source 1gc according to a third modified example of the light source 1g. The light emitting module 100gc has a light source 1gc. The configuration of the light emitting module 100gc other than the light source 1gc may be the same as that of the light emitting module 100. FIG. 16A is a cross-sectional view of the light emitting module 100gc showing the state before the first lens 2 changes, and FIG. 16B is a cross-sectional view of the light emitting module 100gc showing the state after the first lens 2 changes. As shown in FIG. 16A and FIG. 16B, the light source 1gc has an optical member 16gc.

[0107] The optical member 16gc is disposed on the upper surface of the mounting substrate 5 so as to house the light emitting element 12, the light-transmitting member 14, and the covering member 15 inside. In the optical member 16gc, the surface facing the light emitting surface 11 via the second air layer 18 is a concave surface 161gc that is recessed in the opposite direction to the direction toward the light emitting surface 11. The concave surface 161gc is included in a portion of the optical member 16gc opposite to the abutted portion 160.

[0108] 16A, light from light-emitting surface 11 is refracted by concave surface 161gc, passes through the inside of optical member 16gc, and then passes through contact portion 160 and first air space 25 to enter first lens 2. The light that entered first lens 2 passes through the inside of first lens 2 and is irradiated toward the illuminated area on the +Z side of first lens 2.

[0109] 16B shows a state in which first lens 2 has been moved in the -Z direction along optical axis 20 by drive unit 3 of FIG. 2 from the state in FIG. 16A, and first portion 21 has come into contact with abutment portion 160. When first portion 21 of first lens 2 comes into contact with abutment portion 160, an external force is applied from abutment portion 160 in the +Z direction. First portion 21 is elastically deformed so as to contract in the Z direction in response to this external force.

[0110] 16B, light from light-emitting surface 11 is refracted by concave surface 161gc, passes through the inside of optical member 16gc, and then passes through abutment portion 160 to enter first lens 2. The light that entered first lens 2 passes through the inside of first lens 2 and is irradiated toward an irradiated area on the +Z side of first lens 2. The light distribution of the light irradiated from light-emitting module 100gc in the state of FIG. 16B differs from the light distribution of the light irradiated from light-emitting module 100gc in FIG. 16A.

[0111] In the light emitting module 100gc, a desired light distribution can be realized in the light emitting module 100gc by controlling the shape of the concave surface 161gc. Note that, although the actual irradiated light is refracted at the interface between the first portion 21 and the second portion 22 and at the interface between the second portion and the air in Fig. 14A to Fig. 16B, the refraction is not shown for simplicity.

[0112] [Third embodiment] 17A and 17B are diagrams illustrating an example of a light emitting module 100h according to the third embodiment. The light emitting module 100h has a light source 1h, a first lens 2h, and a second lens 6. The configuration of the light emitting module 100h other than the light source 1h, the first lens 2h, and the second lens 6 may be the same as that of the light emitting module 100. FIG. 17A is a cross-sectional view of the light emitting module 100h showing the state before the first lens 2h changes. FIG. 17B is a cross-sectional view of the light emitting module 100h showing the state after the first lens 2h changes.

[0113] The light source 1h has a light source 1-1h and a light source 1-2h as a plurality of light-emitting units. The light source 1-1h and the light source 1-2h are aligned in the X direction. The light source 1h also has two light sources aligned in the Y direction. That is, the light source 1h has a total of four light sources. The light source 1h corresponds to a plurality of light sources aligned in each of the X direction and the Y direction. The light source 1h may have a plurality of light sources aligned in either the X direction or the Y direction. Each of the four light sources in the light source 1h may have the same configuration as the light source 1 described above. The function of the light source 1h may be the same as that of the light source 1f described above, except for the number of light sources.

[0114] The first lens 2h includes a first lens 2-1h and a first lens 2-2h. The first lens 2-1h and the first lens 2-2h are aligned in the X direction in pairs with a plurality of light sources. Alternatively, the first lens 2h includes two first lenses aligned in the Y direction in pairs with a plurality of light sources. That is, the first lens 2h includes a total of four first lenses. The first lens 2h corresponds to a plurality of first lenses arranged in pairs with a plurality of light sources in each of the X direction and the Y direction. The first lens 2h may include a plurality of first lenses aligned in either the X direction or the Y direction in accordance with the light source 1h. Each of the four first lenses 2 in the first lens 2h may have the same configuration as the first lens 2 described above. The function of the first lens 2h may be substantially the same as that of the first lens 2f described above, except for the number of first lenses.

[0115] The four first lenses of the first lens 2h are integrally formed. In other words, the four first lenses are connected. The four first lenses are made of a material containing a resin material and can be integrally formed by molding or the like.

[0116] The second lens 6 is disposed on the +Z side of the first lens 2h. The second lens 6 transmits light from the first lens 2h. The optical axis 60 is the optical axis of the second lens 6. The light transmitted through the second lens 6 is irradiated onto an irradiated area on the +Z side of the second lens 6. The second lens 6 is made of a material including a resin material, a glass material, etc. The second lens 6 is not limited to a biconvex lens, but may be a plano-convex lens, a meniscus lens, a biconcave lens, a plano-concave lens, etc. Furthermore, the second lens 6 is not limited to a single lens, but may be a compound lens including a plurality of lenses.

[0117] FIG. 18A is a diagram showing an example of the irradiated light in the state of FIG. 17A. FIG. 18B is a diagram showing an example of the irradiated light in the state of FIG. 17B. FIG. 18A and FIG. 18B show the simulation results of the illuminance distribution irradiated to the irradiated surface 500 mm away from the light source 1h in the direction along the optical axis 60. As shown in FIG. 18A, in the state of FIG. 17A, that is, in the state where the first lens 2h is not in contact with the light source 1h, the irradiated area 200 is provided with the irradiated light 210-1h. As shown in FIG. 18B, in the state of FIG. 17B, that is, in the state where the first lens 2h is in contact with the light source 1h, the irradiated area 200 is provided with the irradiated light 210-2h. As shown in FIG. 18B, the light emitting module 100h can change the distribution of the irradiated light so that the area of ​​the irradiated light 210-2h in each of the multiple light emitting units is wider than the area of ​​the irradiated light 210-1h in the irradiated area 200.

[0118] The light distribution of the irradiated light 210-2h is different from that of the irradiated light 210-1h. In the light emitting module 100h, the light distribution can be changed by controlling the shape, position, etc. of the second lens 6. In addition, partial irradiation is possible by individually controlling the light emission (in other words, turning on) and non-emission (in other words, turning off) of each of the light sources 1-1h and 1-2h. Partial irradiation refers to an irradiation method in which light is irradiated only from the light source that emits light among the light sources 1-1h and 1-2h. The brightness of each light source may be adjusted by changing the current value flowing through each light source. Furthermore, in the state of FIG. 17A, the number of divisions into which the irradiated area 200 is divided by partial irradiation can be changed by changing the position in the X direction and the Y direction, that is, in the direction intersecting the optical axis 60 of the second lens 6.

[0119] [Fourth embodiment] 19A and 19B are diagrams illustrating an example of a light emitting module 100i according to a fourth embodiment. The light emitting module 100i has a light source 1i and a first lens 2i. The configuration of the light emitting module 100i other than the light source 1i and the first lens 2i may be the same as that of the light emitting module 100. FIG. 19A is a cross-sectional view of the light emitting module 100i showing the state before the first lens 2i changes. FIG. 19B is a cross-sectional view of the light emitting module 100i showing the state after the state of the first lens 2i changes.

[0120] The light source 1i has a light source 1-1i and a light source 1-2i as a plurality of light-emitting units. The light source 1-1i and the light source 1-2i are aligned in the X direction. The light source 1i may have a plurality of light sources aligned in the Y direction. The light source 1i may also have a plurality of light sources aligned in each of the X direction and the Y direction. The light source 1-1i emits light of a first chromaticity. The light source 1-2i emits light of a second chromaticity different from the first chromaticity.

[0121] The first lens 2i includes a first lens 2-1i and a first lens 2-2i. The first lens 2-1i and the first lens 2-2i are arranged in pairs with a plurality of light sources. The first lens 2i may include a plurality of first lenses aligned in the Y direction in accordance with the light source 1i. The first lens 2i may include a plurality of first lenses aligned in each of the X direction and the Y direction in accordance with the light source 1i. Each of the first lens 2-1i and the first lens 2-2i may have the same configuration as the first lens 2 described above. The function of the first lens 2i may be substantially the same as that of the first lens 2f described above, except for the number of first lenses.

[0122] The light emitting module 100i has a light source 1i including a plurality of light emitting units with different chromaticities of light emitted, and can adjust the color by mixing the light of different chromaticities. In this case, the light source 1i only needs to include at least one light emitting unit with different chromaticities, and the number of light emitting units with different chromaticities included in the light source 1i may be the same or different. For example, when the light emitting module 100i is used as a camera flash, the light source 1i preferably includes a white light emitting unit and an amber light emitting unit as light emitting units with different chromaticities, and includes more white light emitting units than amber light emitting units. This allows the light emitting module 100i to emit light within a color adjustment range suitable for a camera flash.

[0123] Although the preferred embodiments have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims.

[0124] The ordinal numbers, quantities, and other numbers used in the description of the embodiments are all provided as examples to specifically explain the technology of the present disclosure, and the present disclosure is not limited to the illustrated numbers. Furthermore, the connection relationships between the components are provided as examples to specifically explain the technology of the present disclosure, and do not limit the connection relationships that realize the functions of the present disclosure.

[0125] The light-emitting module of the present disclosure can irradiate light to a desired partial illumination area, and can therefore be suitably used for illumination, camera flashes, vehicle headlights, etc. Examples of cameras include cameras that take still images and video cameras that take videos. However, the light-emitting module of the present disclosure is not limited to these applications.

[0126] In addition to the above-described embodiment and modified examples, a plurality of first lenses arranged in a matrix may be provided for one light source. Since the thickness of the first lens can be reduced, the thickness of the entire light emitting module can be reduced, and the light emitting module can be made smaller. Also, one first lens may be provided for a light source including a plurality of light emitting units arranged in a matrix. The first lens can be made to have a simple shape, and mass productivity can be improved. Furthermore, the first lens may be a plano-convex lens, a plano-concave lens, a biconvex lens, a biconcave lens, or the like. The number of optical interfaces is increased, and optical controllability can be improved.

[0127] Aspects of the present disclosure are, for example, as follows. <Item 1> A light emitting module having a light source, a first lens that transmits light from the light source and has at least a portion that is elastically deformable, and a drive unit that moves the first lens in a direction along an optical axis of the first lens, wherein the light source includes an abutment portion with which the first lens abuts, and the movement of the first lens changes a state of the first lens with respect to the abutment portion. <Item 2> The light-emitting module described in <Item 1>, wherein the state of the first lens with respect to the abutment portion includes a state in which there is a first air layer between the abutment portion and the first lens, and a state in which the first air layer is reduced compared to a state in which the first air layer is present. <Item 3> The light-emitting module described in <Item 1> or <Item 2>, wherein the first lens includes a first portion that is elastically deformable by abutting against the abutted portion, and a second portion that is harder than the first portion. <Item 4> The light-emitting module according to <Item 3>, wherein the contact portion has a hardness higher than a hardness of the first portion. <Item 5> The light emitting module according to any one of <Item 1> to <Item 4>, wherein the light source includes a light emitting surface and an optical member that is disposed between the light emitting surface and the first lens and transmits light from the light emitting surface, the optical member including the abutment portion. <Item 6> The light emitting module according to <Item 5>, wherein the light source has a second air layer between the light emitting surface and the optical member in a direction along the optical axis of the first lens. <Item 7> The light-emitting module according to <Item 5>, wherein the optical member includes, in a portion facing the abutted portion, one of a Fresnel lens surface, a convex surface protruding toward the light-emitting surface, or a concave surface recessed in a direction opposite to the direction toward the light-emitting surface. <Item 8> The light-emitting module according to claim 1 or <Item 2>, wherein the first lens includes a first portion that is elastically deformable by abutting against the abutted portion, and a reflecting portion provided around the first portion when viewed from above. <Item 9> An optical emission module according to any one of <Item 1> to <Item 8>, comprising: a plurality of light sources aligned in a first direction, a second direction perpendicular to the first direction, or both the first direction and the second direction; and a plurality of first lenses arranged in pairs with the plurality of light sources, wherein the plurality of first lenses are integrally formed. <Item 10> The light emitting module according to any one of <Item 1> to <Item 9>, further comprising a second lens above the first lens, the second lens transmitting light from the first lens. [Explanation of symbols]

[0128] 1, 1a, 1b, 1c, 1d, 1f, 1g, 1ga, 1gb, 1gc light source 11 Light-emitting surface 12 Light emitting element 13 electrodes 14, 14a Translucent member 15, 15a, 15c, 15d Covering material 16, 16g Optical components 160 Abutted part 161 Opposite Surface 17, 17d Light diffusion member 18 Second Air Layer 2, 2e, 2f, 2h, 2i First lens 20 Optical axis 21 Part 1 22 Part 2 23 Adhesive materials 24 Part 3 241 Reflector 25 First Air Layer 3 Drive unit 4. Chassis 41 Aperture 5 Mounting board 51 Wiring 52 Conductive adhesive material 6 Second lens 60 Optical axis 100, 100e, 100f, 100g, 100ga, 100gb, 100gc, 100h, 100i light emitting module 200 Irradiated area 210-1, 210-2, 210-1h, 210-2h irradiation light L0, L1, L2 light θ1 1st irradiation angle θ2 Second irradiation angle t Length Δt change

Claims

1. A light source; A first lens that transmits light from the light source; a drive unit that moves the first lens in a direction along an optical axis of the first lens, the light source includes a contact portion against which the first lens contacts, the first lens includes a first portion that is elastically deformable by contacting the contact portion, and a reflecting portion provided around the first portion in a top view, A light emitting module, wherein a state of the first lens with respect to the abutment portion changes due to movement of the first lens.

2. The light-emitting module of claim 1, wherein the state of the first lens relative to the abutment portion includes a state in which there is a first air layer between the abutment portion and the first lens, and a state in which the first air layer is reduced compared to a state in which the first air layer is present.

3. The light emitting module according to claim 1 , wherein the first lens further includes a second portion having a harderness than the first portion.

4. The light emitting module according to claim 3 , wherein the contact portion has a hardness higher than a hardness of the first portion.

5. The light source is A light-emitting surface; an optical member disposed between the light emitting surface and the first lens and transmitting light from the light emitting surface; The light emitting module according to claim 1 , wherein the optical member includes the contact portion.

6. The light emitting module according to claim 5 , wherein the light source has a second air layer between the light emitting surface and the optical member in a direction along the optical axis of the first lens.

7. The light emitting module according to claim 5 , wherein the optical member includes, in a portion facing the abutted portion, one of a Fresnel lens surface, a convex surface protruding toward the light emitting surface, or a concave surface recessed toward the light emitting surface.

8. a plurality of the light sources aligned in a first direction, a second direction perpendicular to the first direction, or both the first direction and the second direction; a plurality of the first lenses arranged in pairs with a plurality of the light sources; The light emitting module according to claim 1 , wherein the first lenses are integrally formed.

9. 3. The light emitting module according to claim 1, further comprising a second lens disposed above the first lens and transmitting the light from the first lens.

10. A plurality of light sources aligned in a first direction, a second direction perpendicular to the first direction, or both the first direction and the second direction; a plurality of first lenses arranged in pairs with the plurality of light sources, transmitting light from the plurality of light sources, and each of which is at least partially elastically deformable; a drive unit that moves the first lenses in a direction along the optical axis of the first lenses, The plurality of light sources include abutment portions against which the plurality of first lenses abut, The first lenses are integrally formed, A light emitting module, wherein a state of each of the first lenses relative to the abutment portion changes as the first lenses move.

11. A light source; a first lens that transmits light from the light source and has at least a portion that is elastically deformable; a drive unit that moves the first lens in a direction along an optical axis of the first lens, the light source includes a contact portion against which the first lens contacts, A state of the first lens with respect to the abutment portion is changed by the movement of the first lens, A light emitting module having a second lens above the first lens, the second lens transmitting light from the first lens.

Images