Light emitting module and smartphone

Abstract

To provide a light emitting module which can emit light distributed at a wide angle.SOLUTION: A light emitting module includes: a light source including a light emission surface; a first lens disposed facing the light source; and a translucent member disposed facing the first lens and for transmitting light emitted from the first lens. The first lens has a concave lens including a first incidence surface into which light from the light source enters, a first emission surface located at the opposite side of the first incidence surface, and a second emission surface forming a part of a side surface. The translucent member includes: an upper surface located above the first emission surface; and a first cylindrical surface located at the outer side of the first lens in a top view. The first emission surface includes a first total reflection part for totally reflecting light entering from the first incidence surface. The first incidence surface includes a second total reflection part for totally reflecting the light totally reflected by the first total reflection part. The light totally reflected by the second total reflection part can be emitted from the first cylindrical surface through the second emission surface.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] Conventionally, light-emitting modules having semiconductor elements such as LEDs (Light Emitting Diodes) have been widely used. For example, Patent Document 1 discloses an LED module including a substrate, an LED package, an ambient light sensor, and a module cover having a lens. The LED module is aligned and positioned with an optically transparent opening in the housing of a device such as a smartphone. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US2021 / 0043614A1 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of an embodiment of the present disclosure is to provide a light-emitting module capable of emitting light with a wide-angle light distribution. [Means for solving the problem]

[0005] An optical emission module according to one embodiment of the present disclosure comprises a light source including a light emitting surface, a first lens arranged opposite the light source, and a translucent member arranged opposite the first lens and transmitting light emitted from the first lens, wherein the first lens has a concave lens including a first entrance surface through which light from the light source is incident, a first exit surface located opposite the first entrance surface, and a second exit surface constituting a part of a side surface, and the translucent member includes an upper surface located above the first exit surface and a first cylindrical surface located outside the first lens in a top view, wherein the first exit surface includes a first total reflection portion that totally reflects light incident from the first entrance surface, and the first entrance surface includes a second total reflection portion that totally reflects light totally reflected at the first total reflection portion, and the light totally reflected at the second total reflection portion can be emitted from the first cylindrical surface via the second exit surface. Effect of the Invention

[0006] According to an embodiment of the present disclosure, it is possible to provide a light-emitting module capable of emitting light with a wide-angle light distribution. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a schematic top view of the light-emitting module according to the first embodiment. [Diagram 2] FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. [Diagram 3] 3 is a schematic optical path diagram showing a plurality of light rays emitted from a light source and passing through a first lens and a light-transmitting member in the light-emitting module according to the first embodiment. FIG. [Figure 4] 2 is a schematic cross-sectional view of a light source included in the light-emitting module according to the first embodiment. FIG. [Diagram 5] 4 is a schematic top view showing a light source having a plurality of light-emitting units, as another example of the light source included in the light-emitting module according to the first embodiment. FIG. [Figure 6] FIG. 11 is a schematic rear view of the smartphone according to the second embodiment. [Figure 7]7 is a schematic cross-sectional view of the vicinity of a light-emitting module included in a smartphone according to a second embodiment, taken along line VII-VII in FIG. 6. FIG. [Figure 8] FIG. 11 is a schematic cross-sectional view of a light-emitting module according to a first modified example. [Figure 9] FIG. 11 is a schematic cross-sectional view of a light-emitting module according to a second modified example. [Figure 10] FIG. 13 is a schematic cross-sectional view of a light-emitting module according to a third modified example. [Figure 11] FIG. 13 is a schematic cross-sectional view of a light-emitting module according to a fourth modified example. [Figure 12] 13 is a schematic cross-sectional view of a first lens included in a light-emitting module according to a fifth modified example. FIG. [Figure 13] FIG. 13 is a schematic cross-sectional view of a light-emitting module according to a fifth modified example. [Figure 14] 13 is a schematic cross-sectional view of a light-transmissive member included in a light-emitting module according to a sixth modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The light-emitting module and smartphone according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, the following embodiments are examples of light-emitting modules and smartphones for embodying the technical ideas of the present embodiment, and are not limited to the following. In addition, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments are merely explanatory examples, and are not intended to limit the scope of the present disclosure, unless otherwise specified. Note that the size, positional relationship, etc. of the components shown in each drawing may be exaggerated to clarify the explanation. In addition, in the following explanation, the same names and symbols indicate the same or similar components, and detailed explanations are omitted as appropriate. As a cross-sectional view, an end view showing only a cut surface may be used.

[0009] In the figures shown below, directions may be indicated by the X-axis, Y-axis, and Z-axis. The X-axis, Y-axis, and Z-axis are mutually perpendicular 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 provided in the light-emitting module according to the embodiment. The Z-direction along the Z-axis indicates a direction perpendicular 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 perpendicular to the XY plane.

[0010] The direction in which the arrow points in the X direction is denoted as the +X side, and the opposite side of the +X side is denoted as the -X side. The direction in which the arrow points in the Y direction is denoted as the +Y side, and the opposite side of the +Y side is denoted as the -Y side. The direction in which the arrow points in the Z direction is denoted as the +Z side, and the opposite side of the +Z side is denoted as the -Z side. In the embodiment, the light source included in the light emitting module emits light to the +Z side, as an example. Furthermore, the top view in the terminology of the embodiment refers to viewing an object from the top side of the translucent member included in the light emitting module according to the embodiment. In addition to the part that can be directly viewed from above, in this specification, the term top view may be used to describe the part that cannot be directly viewed from above as if it were seen through. However, these do not limit the orientation of the light emitting module according to the embodiment when used, and the orientation of the light emitting module according to the embodiment is arbitrary.

[0011] In this specification, the surface of an object when viewed from the +Z side is referred to as the "top surface," and the surface of an object when viewed from the -Z side is referred to as the "bottom surface." In addition, the +Z side of an object may be referred to as the "upper" and the -Z side of an object as the "lower." In the embodiments described below, "along the X-axis, Y-axis, and Z-axis" includes an object having a tilt within a range of ±10° with respect to these axes. In addition, in this embodiment, orthogonal may include an error within ±10° with respect to 90°.

[0012] [First embodiment] <Configuration Example of Light-Emitting Module According to First Embodiment> Referring to FIGS. 1 and 2, the overall configuration of the light-emitting module according to the first embodiment will be described. FIG. 1 is a schematic top view showing an example of the light-emitting module 100 according to the first embodiment. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1.

[0013] As shown in FIGS. 1 and 2, the light-emitting module 100 includes a light source 1 including a light-emitting surface 16, a first lens 2 disposed opposite to the light source 1, and a light-transmissive member 3 disposed opposite to the first lens 2 and transmitting the light L emitted from the first lens 2. The first lens 2 has a concave lens 21 including a first incident surface 211 for receiving the light L from the light source 1, a first exit surface 212 located on the opposite side of the first incident surface 211, and a second exit surface 213 constituting a part of the side surface. The light-transmissive member 3 includes an upper surface 311 located above the first exit surface 212 and a first cylindrical surface 322 located outside the first lens 2 in a top view. The first exit surface 212 includes a first total reflection portion 210 that totally reflects the light L incident from the first incident surface 211. The first incident surface 211 includes a second total reflection portion 220 that totally reflects the light L2 totally reflected by the first total reflection portion 210. The light-emitting module 100 can emit the light totally reflected by the second total reflection portion 220 from the first cylindrical surface 322 through the second exit surface 213.

[0014] In the example shown in FIG. 2, the light source 1 is disposed on the upper surface (surface on the +Z side) of the wiring board 4. The first lens 2 includes a connection portion 22 adjacent to the entire circumference of the first entrance surface 211 of the concave lens 21. The connection portion 22 includes an annular connection surface 221 disposed outside the second exit surface 213 included in the first lens 2 in a top view. The first lens 2 is fixed to the wiring board 4 by connecting the lower surface of the connection portion 22 to the upper surface of the wiring board 4 using an adhesive member. The first lens 2 forms a recess that covers the upper surface and side surface of the light source 1 with the first entrance surface 211 of the concave lens 21 and the connection portion 22. It is preferable that the distance in the Z direction between the light source 1 and the first lens 2 is as short as possible. In a top view, the translucent member 3 covers the first exit surface 212 and the connection surface 221 of the first lens 2. The first translucent member 3 is fixed to the first lens 2 by connecting the connection portion 22 to the translucent member 3 using an adhesive member 24. The first light-transmissive member 3 may be fixed to the first lens 2 by connecting the side surface of the wiring board 4 and the light-transmissive member 3 with an adhesive member.

[0015] In the example shown in FIG. 2, the light-transmitting member 3 includes an upper portion 31, a cylindrical portion 32, and a leg portion 33. The upper portion 31, the cylindrical portion 32, and the leg portion 33 are integrally connected. The light-transmitting member 3 has a substantially circular shape when viewed from above. However, the upper portion 31, the cylindrical portion 32, and the leg portion 33 may be separate members. The shape of the light-transmitting member 3 when viewed from above may be substantially elliptical, substantially polygonal, substantially rectangular, or the like. From the viewpoint of wide-angle light distribution and substantially uniformly irradiating light around the entire periphery of the light-transmitting member 3, it is preferable that the shape of the light-transmitting member 3 when viewed from above is substantially circular.

[0016] The upper surface 311 is the upper surface of the upper part 31. The first cylindrical surface 322 is the outer surface of the cylindrical part 32. In the example shown in FIG. 2, the upper part 31 includes a lower surface 312. The cylindrical part 32 includes an inner surface 321 of the cylindrical part 32 and a stepped part 323. The stepped part 323 is a stepped portion provided on the entire circumference of the inner surface 321. The stepped part 323 faces the connection surface 221 of the connection part 22 and includes a substantially circular ring-shaped surface when viewed from above. In a state where the stepped part 323 and the connection surface 221 face each other, the first lens 2 and the light-transmissive member 3 can be joined by joining the stepped part 323 and the connection surface 221 with ultrasonic waves or an adhesive member or the like. Note that the stepped part 323 may be provided intermittently on the inner surface 321.

[0017] The first total reflection part 210 is a part of the first emission surface 212 where the light L incident from the first incident surface 211 is totally reflected. In the example shown in FIG. 2, the first total reflection part 210 is circular when viewed from above with the central axis 20 of the first lens 2 as the center. The first total reflection part 210 may be at least a part of the first emission surface 212. Further, the second total reflection part 220 is a part of the first incident surface 211 where the light L totally reflected by the first total reflection part 210 is totally reflected. In the example shown in FIG. 2, the second total reflection part 220 is circular when viewed from above with the central axis 20 of the first lens 2 as the center. The second total reflection part 220 may be at least a part of the first incident surface 211.

[0018] In the example shown in FIG. 2, among the light L emitted from the first lens 2, the light L1 that is emitted from the first emission surface 212 without being totally reflected passes through the upper part 31 of the light-transmissive member 3 and is emitted from the upper surface 311. On the other hand, among the light L emitted from the first lens 2, the light L2 that is totally reflected by the first total reflection part 210 is further totally reflected by the second total reflection part 220 and then emitted from the second emission surface 213. The light L2 emitted from the second emission surface 213 passes through the cylindrical part 32 of the light-transmissive member 3 and is emitted from the first cylindrical surface 322.

[0019] The light emitting module 100 can emit the light L emitted from the first lens 2 from both the upper surface 311 of the light-transmitting member 3 and the first cylindrical surface 322. This allows the light emitting module 100 to emit light with a wide-angle light distribution. In other words, in this embodiment, it is possible to provide the light emitting module 100 that can emit light with a wide-angle light distribution.

[0020] Moreover, in the light-emitting module 100, the first lens 2 is a rotationally symmetric body. In the example shown in Figs. 1 and 2, the first lens 2 is a rotationally symmetric body rotated around a central axis 20 of the first lens 2 along the normal line of the light-emitting surface 16. Since the first lens 2 is a rotationally symmetric body, the light-emitting module 100 can emit light L incident on the first lens 2 from the light source 1 in all directions around the rotation axis of the rotationally symmetric body. This allows the light-emitting module 100 to emit light with a wide-angle light distribution in all directions around the rotation axis. Note that the first lens 2 is not limited to being a rotationally symmetric body.

[0021] Moreover, in light-emitting module 100, second emission surface 213 of first lens 2 includes a second cylindrical surface. The second cylindrical surface is an outer surface of first lens 2, which is cylindrical. In the example shown in FIG. 2, the second cylindrical surface is a portion occupying a range from the upper end of first emission surface 212 to the upper end of connection portion 22 in the direction along central axis 20. Moreover, in the example shown in FIG. 2, second emission surface 213 is the second cylindrical surface.

[0022] Since the second emission surface 213 includes the second cylindrical surface, the light emitting module 100 can emit the light L2 emitted from the light source 1 to the cylindrical portion 32 of the light-transmitting member 3 through the second cylindrical surface of the first lens 2, and can emit the light L2 that has transmitted through the cylindrical portion 32 of the light-transmitting member 3 from the first cylindrical surface 322. This allows the light emitting module 100 to emit the light L2 in all directions around the cylindrical axis of the first cylindrical surface 322, and can emit light with a wide-angle light distribution.

[0023] In the light emitting module 100, in a cross section including the central axis 20 of the first lens 2 along the normal line of the light emitting surface 16, the first entrance surface 211 of the first lens 2 includes a first convex portion 231 that is convex toward the light source 1 side on one side (e.g., the -X side) of the central axis 20 of the first lens 2, and includes a second convex portion 232 that is convex toward the light source 1 side on the other side (e.g., the +X side) of the central axis 20 of the first lens 2. The cross section including the central axis 20 of the first lens 2 illustrated in FIG. 1 and FIG. 2 is a cross section that includes the central axis 20 of the first lens 2 and is parallel to the XZ plane. The first convex portion 231 and the second convex portion 232 can be disposed at positions symmetrical to each other with respect to the central axis 20 of the first lens 2 as the center in the cross section including the central axis 20 of the first lens 2, and can have shapes symmetrical to each other.

[0024] A cross section including the central axis 20 of the first lens 2 is not limited to a cross section parallel to the XZ plane, and may be any cross section including the central axis 20 of the first lens 2. In the example shown in Fig. 2, since the first lens 2 is a rotationally symmetric body, the shape of the first convex portion 231 and the shape of the second convex portion 232 are substantially the same even in any cross section including the central axis 20 of the first lens 2. The first entrance surface 211 of the first lens 2 may be a rotationally symmetric surface obtained by rotating either the first convex portion 231 or the second convex portion 232 around the central axis 20.

[0025] Since first incident surface 211 includes first convex portion 231 and second convex portion 232, a part of light L from light source 1 which is incident on first lens 2 through first incident surface 211 can be totally reflected by first total reflection portion 210 and second total reflection portion 220, respectively, and then can be emitted from first cylindrical surface 322 of light-transmitting member 3. As a result, in this embodiment, it is possible to provide light-emitting module 100 which is capable of emitting light with a wide-angle light distribution.

[0026] Each of first convex portion 231 and second convex portion 232 on first entrance surface 211 may include a free curve whose radius of curvature increases with increasing distance from central axis 20 of first lens 2. This makes it easier for first total reflection portion 210 and second total reflection portion 220 to satisfy the total reflection condition, thereby making it possible to increase the amount of light L2 emitted from first cylindrical surface 322 of light-transmitting member 3.

[0027] 1, the shape of the first lens 2 when viewed from above is substantially circular. However, the shape of the first lens 2 when viewed from above may be substantially rectangular, substantially elliptical, substantially polygonal, etc. Furthermore, the shape of the first lens 2 when viewed from above may be a rotationally symmetric shape.

[0028] In the example shown in FIG. 2, the first lens 2 is configured as a concave lens that is thin in the center and thicker toward the outside. The first exit surface 212 of the first lens 2 includes a concave surface 216. The concave surface 216 is a concave spherical surface. The concave surface 216 of the first exit surface 212 may be a concave aspheric surface. The outer edge of the concave surface 216 is substantially circular with the center on the central axis 20 of the first lens 2 when viewed from above. The first exit surface 212 also includes a flat surface portion 214 other than the spherical surface or the aspheric surface. The flat surface portion 214 is in contact with the outer edge of the concave surface 216, is provided on the entire circumference of the concave surface 216, and has a circular ring shape when viewed from above. In the first exit surface 212, the area of ​​the flat surface portion 214 varies depending on the radius of curvature of the spherical surface or the paraxial radius of curvature of the aspheric surface. In addition, the size of the first lens 2 in a top view, the radius of curvature of the first exit surface 212, the lens thickness, the shapes of the first convex portion 231 and the second convex portion 232, and the like of the first lens 2 can be appropriately changed. In the example shown in Fig. 2, the first lens 2 is a concave lens including the first convex portion 231 and the second convex portion 232 on the first entrance surface 211, but is not limited to this. For example, the first lens 2 may be a biconcave lens in which the first entrance surface 211 and the first exit surface 212 each include a concave surface.

[0029] The first lens 2 can be made of at least one of a resin material, such as polycarbonate resin, acrylic resin, silicone resin, epoxy resin, or a glass material, that is translucent to the light L emitted from the light source 1. The translucency of the first lens 2 is preferably such that it has a light transmittance of 60% or more to the light emitted from the light source 1.

[0030] The light-transmitting member 3 is disposed so as to cover the light source 1 and the first lens 2. In the example shown in FIG. 1, the light-transmitting member 3 has a substantially circular shape when viewed from above. However, the shape of the light-transmitting member 3 when viewed from above may be substantially elliptical, substantially rectangular, substantially polygonal, or the like. The light-transmitting member 3 is configured to include at least one of a resin material, such as a polycarbonate resin, an acrylic resin, a silicone resin, or an epoxy resin, that is transmissive to the light L emitted from the light source 1, or a glass material. Note that the light-transmitting property of the light-transmitting member 3 is preferably a property that has a light transmittance of 60% or more for the light emitted from the light source 1.

[0031] FIG. 3 is a schematic optical path diagram showing an example of a plurality of light rays emitted from the light source 1 and passing through the first lens 2 and the light-transmitting member 3 in the light-emitting module 100. As shown in FIG.

[0032] In the example shown in FIG. 3, the light L emitted from the light emitting surface 16 of the light source 1 enters the first lens 2 from the first entrance surface 211 of the first lens 2. A part of the light L, namely, light L1, of the light L that enters the first lens 2 passes through the first lens 2 and the light-transmitting member 3 and is emitted from the upper surface 311 of the light-transmitting member 3. In FIG. 3, each of the multiple straight lines extending from the upper surface 311 represents a ray of the light L1. The first lens 2 is a concave lens 21 that is thicker toward the outside. In addition, the light is refracted at the interface between the lens and the air toward the side where the lens thickness is thicker than the lens thickness at the incident position. Therefore, the light L1 is refracted outward at the first entrance surface 211, and then further refracted outward at the first exit surface 212, and is emitted from the upper surface 311. As a result, the light emitting module 100 can emit the light L1 with a wide-angle light distribution from the upper surface 311 within a range of a light distribution angle of -90 degrees or more and 90 degrees or less.

[0033] On the other hand, a part of the light L that enters the first lens 2, that is, light L2, is totally reflected inside the first lens 2 and then emitted from the first lens 2. Then, the light L2 passes through the cylindrical portion 32 of the light-transmitting member 3 shown in FIG. 2 and is emitted from the first cylindrical surface 322. In FIG. 3, each of the multiple straight lines extending from the first cylindrical surface 322 represents a light ray of the light L2. The light L2 emitted from the first cylindrical surface 322 is mainly emitted to the +Z side. In other words, the light L2 includes light with a light distribution angle of 0 degrees to -120 degrees that is emitted to the -X side and light with a light distribution angle of 0 degrees to +120 degrees that is emitted to the +X side. This allows the light-emitting module 100 to emit light from the first cylindrical surface 322 with a larger light distribution angle than the light L1 emitted from the upper surface 311. FIG. 3 shows an example in which light L2 includes light with a light distribution angle of 0 degrees to -90 degrees emitted to the -X side, and light with a light distribution angle of 0 degrees to +90 degrees emitted to the +X side.

[0034] As shown in FIG. 3, the light emitting module 100 can emit light with a wide-angle distribution by emitting light L emitted from the first lens 2 from both the upper surface 311 and the first cylindrical surface 322 of the light-transmitting member 3.

[0035] Next, the configuration of the light source 1 will be described in detail with reference to Fig. 4. Fig. 4 is a schematic cross-sectional view showing an example of the light source 1. The example shown in Fig. 4 shows a cross-section of the light source 1 including the central axis 20 of the first lens 2 shown in Fig. 2. In a top view, the center 2c of the light source 1 approximately coincides with the central axis 20 of the first lens 2.

[0036] The light source 1 includes at least one light-emitting section 10. The light-emitting section 10 includes a light-emitting element 12, a wavelength conversion member 14 disposed on the light-emitting element 12, and a covering member 15 that covers each of the side surfaces of the light-emitting element 12 and the wavelength conversion member 14.

[0037] In the example shown in FIG. 4, the light source 1 has one light-emitting unit 10 including a light-emitting surface 11. The light-emitting unit 10 emits light from the light-emitting surface 11 toward the upper side of the light source 1. The light-emitting surface 11 refers to a main light extraction surface of the light-emitting unit 10. The light emitted from the light-emitting unit 10 is preferably white light, but may have a specific wavelength such as blue. The wavelength and chromaticity of the light emitted from the light-emitting unit 10 may be appropriately selected depending on the use of the light-emitting module 100. In this embodiment, the light-emitting surface 16 of the light source 1 coincides with the light-emitting surface 11 of the light-emitting unit 10.

[0038] The light-emitting unit 10 includes the light-emitting element 12 and the wavelength conversion member 14, and can emit a mixed color light of the color of light emitted from the light-emitting element 12 and the color of light emitted from the wavelength conversion member 14. In the light-emitting unit 10, the combination of the light-emitting element 12 and the wavelength conversion member 14 can increase the degree of freedom of the color of light emitted from the light source 1. In addition, the light-emitting unit 10 includes the covering member 15, and can reduce the light leaking from the light-emitting unit 10 and the covering member 15, and can increase the light extraction efficiency of the light-emitting unit 10.

[0039] 4, the light-emitting unit 10 is disposed on the +Z side surface of the wiring board 4, with the upper surface serving as the light-emitting surface 11 and the surface opposite to the light-emitting surface 11 serving as the mounting surface. The wavelength conversion member 14 is provided on the +Z side surface of the light-emitting element 12. The covering member 15 covers the side surfaces of the light-emitting element 12 and the wavelength conversion member 14, except for the upper surface of the wavelength conversion member 14.

[0040] The light emitting element 12 has at least a pair of positive and negative electrodes 13 on the surface opposite to the light emitting surface 11 (that is, the lower surface).

[0041] The light emitting element 12 includes various semiconductors such as III-V group compound semiconductors and II-VI group compound semiconductors. X Al Y Ga 1-X-YIt is preferable to use a nitride-based semiconductor such as InN (0≦X, 0≦Y, X+Y≦1), and InN, AlN, GaN, InGaN, AlGaN, InGaAlN, etc. can also be used. The light-emitting element 12 is, for example, an LED or an LD (Laser Diode). From the viewpoints of luminous efficiency and excitation of the wavelength conversion substance, the emission peak wavelength of the light-emitting element 12 is preferably 400 nm or more and 530 nm or less, more preferably 420 nm or more and 490 nm or less, and even more preferably 450 nm or more and 475 nm or less.

[0042] The wavelength conversion member 14 is, for example, a substantially rectangular member when viewed from above. The wavelength conversion member 14 is provided so as to cover the upper surface of the light emitting element 12. The wavelength conversion member 14 includes a wavelength conversion material that converts the wavelength of at least a part of the light from the light emitting element 12. The wavelength conversion member 14 can be configured 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 that has excellent light resistance and heat resistance is preferable. Note that the light transmittance here is preferably a property that transmits 60% or more of the light from the light emitting element 12. In addition, the wavelength conversion member 14 can be made of a thermoplastic resin such as a polycarbonate resin, an acrylic resin, a methylpentene resin, or a polynorbornene resin. Furthermore, the wavelength conversion member 14 may include a light diffusing material in the above-mentioned resin. For example, the wavelength conversion member 14 may be a resin material, ceramics, glass, or the like containing a wavelength conversion substance, a sintered body of a wavelength conversion substance, etc. Furthermore, the wavelength conversion member 14 may be a multi-layer member in which a resin layer is arranged on the ±Z side surfaces of a molded body of resin, ceramics, glass, or the like.

[0043] The wavelength converting material contained in the wavelength converting member 14 may be, for example, an yttrium-aluminum-garnet phosphor (e.g., (Y,Gd) 3 (Al,Ga) 5 O 12 :Ce), lutetium aluminum garnet phosphors (e.g., Lu 3 (Al,Ga)5 O 12 :Ce), terbium aluminum garnet-based phosphor (e.g., Tb 3 (Al,Ga) 5 O 12 :Ce), CCA-based phosphor (e.g., Ca 10 (PO 4 ) 6 Cl 2 :Eu), SAE-based phosphor (e.g., Sr 4 Al 14 O 25 :Eu), chlorosilicate-based phosphor (e.g., Ca 8 MgSi 4 O 16 Cl 2 :Eu), silicate-based phosphor (e.g., (Ba,Sr,Ca,Mg) 2 SiO 4 :Eu), β-sialon-based phosphor (e.g., (Si,Al) 3 (O,N) 4 :Eu) or α-sialon-based phosphor (e.g., Ca(Si,Al) 12 (O,N) 16 :Eu), etc., oxynitride-based phosphors, LSN-based phosphors (e.g., (La,Y) 3 Si 6 N 11 :Ce), BSESN-based phosphors (e.g., (Ba,Sr) 2 Si 5 N 8 :Eu), SLA-based phosphors (e.g., SrLiAl 3 N 4 :Eu), CASN-based phosphors (e.g., CaAlSiN 3 :Eu) or SCASN-based phosphors (e.g., (Sr,Ca)AlSiN 3 :Eu), etc., nitride-based phosphors, KSF-based phosphors (e.g., K 2 SiF 6 :Mn), KSAF-based phosphors (e.g., K 2 (Si 1-x Al x )F 6-x :Mn Here, x satisfies 0 < x < 1.) or MGF-based phosphors (e.g., 3.5MgO·0.5MgF 2 ·GeO 2Fluoride-based phosphors such as (Cs,FA,MA)(Pb,Sn)(F,Cl,Br,I) and quantum dots with perovskite structures such as (Cs,FA,MA)(Pb,Sn)(F,Cl,Br,I) 3 Here, 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 ) and the like can be used. The above wavelength converting substances are particles. Furthermore, one of these wavelength converting substances can be used alone, or two or more of these wavelength converting substances can be used in combination.

[0044] In the light source 1, a blue light-emitting element is used as the light-emitting element 12, and the wavelength conversion member 14 emits white light by containing a wavelength conversion material that converts the wavelength of the light emitted from the light-emitting element 12 to yellow. Examples of the light diffusing material contained in the wavelength conversion member 14 include titanium oxide, barium titanate, aluminum oxide, and silicon oxide.

[0045] The covering member 15 is a member that covers the side surfaces of the light emitting element 12 and the wavelength conversion member 14. The covering member 15 directly or indirectly covers the side surfaces of the light emitting element 12 and the wavelength conversion member 14. The upper surface of the wavelength conversion member 14 is exposed from the covering member 15 and is the light emitting surface 11 of the light emitting section 10. The covering member 15 is preferably made of a member with high light reflectance in order to improve the light extraction efficiency. The covering member 15 contains a light reflective substance such as a white pigment, for example. An organic material such as a resin can be used. The covering member 15 may be a light-reflective member made of an inorganic material including, for example, boron nitride or an alkali metal silicate. In this case, it may further include titanium oxide or zirconium oxide. Note that the covering member 15 does not need to cover the side surface of the wavelength conversion member 14 as long as it covers the lower surface of the wavelength conversion member 14.

[0046] Examples of light-reflecting substances 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, silicon oxide, etc., and it is preferable to use one of these alone or two or more of these in combination. In addition, as the resin material, it is preferable to use a resin material containing a thermosetting resin such as epoxy resin, epoxy-modified resin, silicone resin, silicone-modified resin, or phenolic resin as the main component as the base material. In addition, the covering member 15 may be composed of a member that is transparent to visible light as necessary.

[0047] The light-emitting section 10 is electrically connected to the wiring 41 provided on the wiring board 4. The wiring board 4 has the wiring 41 arranged on the surface. The wiring board 4 may have the wiring 41 inside. The light-emitting section 10 and the wiring board 4 are electrically connected by connecting the wiring 41 of the wiring board 4 to at least a pair of positive and negative electrodes 13 of the light-emitting section 10 via a conductive member 42. The configuration, size, etc. of the wiring 41 of the wiring board 4 are set according to the configuration and size of the electrodes 13 of the light-emitting section 10.

[0048] The wiring 41 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 41 from the viewpoint of wettability and light reflectivity of the conductive member 42, etc.

[0049] The light source 1 is not limited to having one light-emitting unit 10 as shown in Fig. 4, but may have a plurality of light-emitting units 10. Fig. 5 is a schematic top view showing an example of a light source 1 having a plurality of light-emitting units 10, as another example of the light source 1 included in the light-emitting module 100.

[0050] 5, the light source 1 may have a plurality of light-emitting sections 10, and the covering member 15 may integrally hold a plurality of light-emitting elements 12 and a plurality of wavelength conversion members 14. In the example shown in Fig. 5, the covering member 15 integrally holds nine light-emitting elements 12 provided in the nine light-emitting sections 10, and nine wavelength conversion members 14 provided in the nine light-emitting sections 10.

[0051] The light source 1 includes a plurality of light emitting units 10, thereby making it possible to increase the amount of light that can be emitted from the light source 1. Furthermore, the covering member 15 integrally holds the plurality of light emitting elements 12 and the plurality of wavelength conversion members 14, making it easy to mount the light source 1.

[0052] In the example shown in FIG. 5, the light source 1 has nine light-emitting units 10, namely, light-emitting units 10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7, 10-8, and 10-9. The nine light-emitting units 10 are arranged vertically or horizontally, or in a matrix, when viewed from above. From another perspective, the nine light-emitting units 10 are arranged along the X direction, or along the X direction and the Y direction perpendicular to the X direction. In the example shown in FIG. 5, the nine light-emitting units 10 are arranged along each of the X direction and the Y direction.

[0053] The light-emitting unit 10-1 includes a light-emitting surface 11-1, the light-emitting unit 10-2 includes a light-emitting surface 11-2, the light-emitting unit 10-3 includes a light-emitting surface 11-3, the light-emitting unit 10-4 includes a light-emitting surface 11-4, and the light-emitting unit 10-5 includes a light-emitting surface 11-5. The light-emitting unit 10-6 includes a light-emitting surface 11-6, the light-emitting unit 10-7 includes a light-emitting surface 11-7, the light-emitting unit 10-8 includes a light-emitting surface 11-8, and the light-emitting unit 10-9 includes a light-emitting surface 11-9. It is preferable that the light-emitting surfaces 11-1 to 11-9 are disposed inside the first lens 2 shown in FIG. 2 (inside the outer shape of the first lens 2) when viewed from above. Since the light-emitting unit 10 and the light-emitting surface 11 overlap when viewed from above, the reference numerals of the light-emitting unit 10 and the light-emitting surface 11 are both shown in the example shown in FIG. 5. In the following description, when two or more items substantially coincide or overlap, the symbols may be written together.

[0054] The first width Wx represents the width of the light-emitting surface 11 along the X direction. The second width Wy represents the width of the light-emitting surface 11 along the Y direction. The first width Wx and the second width Wy are, for example, 30 μm or more and 2000 μm or less, and preferably 100 μm or more and 1000 μm or less. The first width Wx and the second width Wy may be substantially equal to each other, but may be different from each other. In the example shown in FIG. 5, the light-emitting surfaces 11 of the adjacent light-emitting units 10 are arranged at a predetermined interval when viewed from above. The first light-emitting surface interval dx in the X direction and the second light-emitting surface interval dy in the Y direction correspond to the predetermined intervals, respectively. From the viewpoint of the light-emitting characteristics of the light source 1, the narrower the first light-emitting surface interval dx and the second light-emitting surface interval dy, the more preferable. However, there is a limit to the interval at which multiple light-emitting units 10 can be mounted. In order to obtain good light emitting characteristics and an interval that allows the mounting of a plurality of light emitting units 10, it is preferable that the first light emitting surface interval dx and the second light emitting surface interval dy are both 10 μm or more and 50 μm or less. In the example shown in Fig. 5, the shape of the light emitting surface 11-1 when viewed from above is substantially rectangular. However, the shape of the light emitting surface 11 when viewed from above may be substantially circular or substantially elliptical, or may be a polygon such as substantially triangular or substantially hexagonal.

[0055] [Second embodiment] Next, a smartphone according to a second embodiment will be described. Note that the same names and symbols as those in the already described embodiment indicate the same or similar members or configurations, and detailed descriptions will be omitted as appropriate. This also applies to the modified examples described below.

[0056] <Configuration example of smartphone according to second embodiment> A smartphone according to the second embodiment will be described with reference to Fig. 6 and Fig. 7. Fig. 6 is a schematic rear view showing an example of the smartphone 1000 according to the second embodiment. Fig. 7 is a schematic cross-sectional view of the vicinity of the light-emitting module 100 included in the smartphone 1000, taken along line VII-VII in Fig. 6.

[0057] As an example, a smartphone includes the light emitting module 100. The light emitting module 100 mounted on the smartphone is used as a flash light source when capturing an image with an imaging device provided in the smartphone.

[0058] 6, the smartphone 1000 includes a light emitting module 100, an imaging device 200, and a housing 300. The imaging device 200 includes an imaging device 200-1 and an imaging device 200-2. The light emitting module 100 and the imaging device 200 are arranged so that a part of them is exposed on the rear side of the smartphone 1000. The rear side of the smartphone 1000 is opposite to the front side on which a display unit constituted by an organic EL (Electro Luminescence) or liquid crystal panel or the like is arranged.

[0059] The light emitted from the light emitting module 100 is used to irradiate a subject with light when photographing by each of the imaging devices 200-1 and 200-2. In this embodiment, it is possible to provide a light emitting module 100 and a smartphone 1000 that can emit light with a wide-angle light distribution as light for a flash. Note that the smartphone 1000 may have two or more light emitting modules 100.

[0060] The imaging device 200 includes a camera for capturing still images and a video camera for capturing moving images. The specifications of the imaging device 200-1 and the imaging device 200-2 may be the same or different from each other. For example, the imaging device 200-1 and the imaging device 200-2 may have different specifications such as shooting resolution or shooting angle of view. The imaging device 200 may include one or more imaging devices. The arrangement of the imaging device 200 and the light emitting module 100 can also be appropriately changed according to the specifications required for the smartphone 1000.

[0061] The housing 300 is a box-shaped member that houses the light-emitting module 100, the imaging device 200, and their control boards, etc. The material that can be used to form the housing 300 is a resin material, a metal material, or the like. The size, shape, etc. of the housing 300 can be appropriately changed according to the specifications required for the smartphone 1000.

[0062] In the smartphone 1000, the light emitting module 100 is disposed such that at least a part of the second exit surface 213 of the first lens 2 protrudes from the housing 300 of the smartphone 1000. In the example shown in FIG. 7, a part of the second exit surface 213 of the first lens 2 and the concave surface 216 and the flat surface 214 of the first exit surface 212 are disposed so as to protrude from the housing 300 of the smartphone 1000. By disposing at least a part of the second exit surface 213 of the first lens 2 so as to protrude from the housing 300 of the smartphone 1000, it is possible to reduce the blocking of the light L2, which is totally reflected by the first total reflection portion 210 of the second exit surface 213 and then emitted from the first cylindrical surface 322 via the second exit surface 213, by the housing 300. As a result, in the smartphone 1000, it is possible to emit light with a wide-angle light distribution while reducing the light loss caused by being blocked by the housing 300. In addition, since the shooting range of a typical imaging device is substantially rectangular, the shape of the first lens 2 when viewed from above may be a four-fold rotationally symmetric shape or a two-fold rotationally symmetric shape.

[0063] The smartphone 1000 is not limited to the light emitting module 100, and may also include light emitting modules according to the first to sixth modified examples described below.

[0064] [Variations] Various modified examples of the light emitting module according to the embodiment will be described below.

[0065] <First Modification> Fig. 8 is a schematic cross-sectional view showing an example of a light-emitting module 100a according to a first modified example. A top view of the light-emitting module 100a is substantially the same as the top view of the light-emitting module 100 shown in Fig. 1. Fig. 8 shows a schematic cross-section of the light-emitting module 100a corresponding to the line II-II in Fig. 1.

[0066] In this modified example, the first lens 2 mainly differs from the first embodiment in that it includes a biconvex lens 23 at a position overlapping with the central axis 20 of the first lens 2 along the normal to the light-emitting surface 11 of the light source 1, that it includes a convex lens 51 arranged on the light source 1 and a lens support portion 52 supporting the convex lens 51, and that the upper surface 311 and the first cylindrical surface 322 of the light-transmitting member 3 include rough surfaces.

[0067] In the example shown in Figure 8, the biconvex lens 23 is positioned so that the convex surface on the upper side (+Z side) of the biconvex lens 23 is convex upward (+Z side) from the first exit surface 212, and so that the convex surface on the lower side (-Z side) of the biconvex lens 23 is convex downward (-Z side) from the first exit surface 212.

[0068] In the light emitting module 100a, the biconvex lens 23 transmits the light L3 emitted from the light source 1, so that the light L3 transmitted through the biconvex lens 23 can be made closer to parallel light (collimated light). This allows the light L3 emitted from the light emitting module 100a to reach a farther distance than when the biconvex lens 23 is not included. Then, the light L3 emitted from the light emitting module 100a can be used to perform telephoto shooting with an imaging device. Note that the light emitting module 100a is not limited to collimating the light L3 transmitted through the biconvex lens 23, and may focus or diverge the light. In addition, in the light emitting module 100a, instead of the biconvex lens 23, a lens having only one of the convex surfaces on the lower side (-Z side) may be used.

[0069] 8, the light-emitting module 100a may also have a convex lens 51 disposed on the light source 1, and a lens support part 52 that supports the convex lens 51. In the example shown in FIG. 8, the light L emitted from the light source 1 passes through the convex lens 51 and the biconvex lens 23, and then passes through the upper part 31 to be emitted from the upper surface 311 of the light-transmitting member 3.

[0070] Since the light emitting module 100a has the convex lens 51 and the biconvex lens 23, it is possible to increase the parallelism of the light L3 transmitted through the convex lens 51 and the biconvex lens 23, compared to a case where only one of the biconvex lens 23 or the convex lens 51 is included. This allows the light L3 emitted from the light emitting module 100a to reach a farther distance, compared to a case where only one of the biconvex lens 23 or the convex lens 51 is included. Then, the light L3 emitted from the light emitting module 100a can be used to perform telephoto shooting with an imaging device. However, the light emitting module 100a is not limited to collimating the light L3 transmitted through the convex lens 51 and the biconvex lens 23, and may focus or diverge the light.

[0071] The convex lens 51 is a plano-convex single lens having a flat surface approximately parallel to the light-emitting surface 11 on the side where the light source 1 is located, and a convex surface on the side opposite to the side where the light source 1 is located. However, the convex lens 51 may have other forms, such as a biconvex single lens, a biconcave single lens, a plano-concave single lens, a Fresnel lens, an array lens, a meniscus single lens, an aspheric lens, or a cylindrical lens.

[0072] The lens support portion 52 is a cylindrical member having a substantially circular shape in a top view. The lens support portion 52 is disposed on the upper surface of the wiring board 4, and supports the convex lens 51 by the upper surface of the lens support portion 52.

[0073] The convex lens 51 and the lens support section 52 can be configured to include at least one of a resin material, such as polycarbonate resin, acrylic resin, silicone resin, epoxy resin, or a glass material, that has translucency to the light L emitted from the light source 1. The translucency of the convex lens 51 and the lens support section 52 is preferably such that they have a light transmittance of 60% or more to the light emitted from the light source 1. However, the lens support section 52 may be a member having a light blocking property. The light blocking property of the lens support section 52 is preferably such that they have a light transmittance of less than 60% to the light emitted from the light source 1.

[0074] In the example shown in FIG. 8, the light-emitting module 100a includes a rough surface on the upper surface 311 and the first cylindrical surface 322 of the light-transmitting member 3. As a result, the light emitted from the light-emitting module 100a is diffused by the rough surfaces of the upper surface 311 and the first cylindrical surface 322 of the light-transmitting member 3, so that the unevenness of the illuminance can be reduced. In addition, since the inside of the light-emitting module 100a is difficult to see from the outside of the light-emitting module 100a, the aesthetic appearance of the light-emitting module 100a can be improved. The rough surface may be provided on either the upper surface 311 or the first cylindrical surface 322 of the light-transmitting member 3, or may be provided on at least a part of the upper surface 311 or at least a part of the first cylindrical surface 322. Instead of the rough surface, a light diffusing material may be disposed on the surface of the upper surface 311 and the first cylindrical surface 322 of the light-transmitting member 3.

[0075] Effects of the light emitting module 100a other than those described above are similar to those of the light emitting module 100 according to the first embodiment.

[0076] <Second Modification> Fig. 9 is a schematic cross-sectional view showing an example of a light-emitting module 100b according to a second modified example. A top view of the light-emitting module 100b is substantially the same as the top view of the light-emitting module 100 shown in Fig. 1. Fig. 9 shows a schematic cross-section of the light-emitting module 100b corresponding to the line II-II in Fig. 1.

[0077] In this modified example, second exit surface 213 of first lens 2 is mainly different from that of the first embodiment in that second exit surface 213 of first lens 2 is inclined so as to approach central axis 20 of first lens 2 along the normal to light-emitting surface 11 as it becomes farther from light-emitting surface 11 of light source 1. From another point of view, second exit surface 213 is a tapered surface that becomes thinner as it becomes farther from light-emitting surface 11 of light source 1.

[0078] In light emitting module 100b, light L4 emitted from second exit surface 213 can be refracted at second exit surface 213 according to the inclination angle of second exit surface 213. This makes it possible to make light L4 emitted from second exit surface 213 have a wider angle than light L2 emitted from second exit surface 213 when second exit surface 213 is not inclined. The inclination angle of second exit surface 213 can be changed as appropriate.

[0079] Effects of the light-emitting module 100b other than those described above are similar to those of the light-emitting module 100 according to the first embodiment.

[0080] <Third Modification> Fig. 10 is a schematic cross-sectional view showing an example of a light-emitting module 100c according to a third modified example. A top view of the light-emitting module 100c is substantially the same as the top view of the light-emitting module 100 shown in Fig. 1. Fig. 10 shows a schematic cross-section of the light-emitting module 100c corresponding to the line II-II in Fig. 1.

[0081] In this modification, the light-transmitting member 3 includes a second lens 34. The second lens 34 includes a second entrance surface 341 facing the first exit surface 212 of the first lens 2. The second entrance surface 341 includes irregularities 342. The irregularities 342 include at least one of a concave portion and a convex portion. In the example shown in FIG. 10, the irregularities 342 include a concave portion recessed toward the upper surface 311 side (+Z side) with respect to the second entrance surface 341. In the example shown in FIG. 10, the central axis 40 of the second lens 34 approximately coincides with the central axis 20 of the first lens 2.

[0082] The second lens 34 may be a Fresnel lens including a Fresnel shape as the concave / convex portions 342. However, the second lens 34 is not limited to a Fresnel lens, and may be in other forms such as a biconvex single lens, a biconcave single lens, a plano-convex single lens, a plano-concave single lens, a Fresnel lens, an array lens, a meniscus single lens, an aspheric lens, or a cylindrical lens.

[0083] The light emitting module 100c can control the light distribution of the light L5 emitted from the light emitting module 100c by transmitting, through the second lens 34, the light L5 emitted from the light source 1 and incident on the second lens 34 via the first lens 2. This allows the light emitting module 100c to have a high degree of freedom in controlling the light distribution of the light L5 emitted from the light emitting module 100c.

[0084] Furthermore, the unevenness 342 may have a plurality of recesses or protrusions that are arranged symmetrically about the central axis 40 in a top view. The symmetric arrangement about the central axis 40 may be a concentric arrangement or a radial arrangement about the central axis 40, etc. By arranging the unevenness 342 symmetrically about the central axis 40 in a top view, the aesthetic appearance of the light-emitting module 100c can be improved.

[0085] Effects of the light emitting module 100c other than those described above are similar to those of the light emitting module 100 according to the first embodiment.

[0086] <Fourth Modification> Fig. 11 is a schematic cross-sectional view showing an example of a light-emitting module 100d according to a fourth modified example. A top view of the light-emitting module 100d is substantially the same as the top view of the light-emitting module 100 shown in Fig. 1. Fig. 11 shows a schematic cross-section of the light-emitting module 100d corresponding to the line II-II in Fig. 1.

[0087] In this modification, the light-transmitting member 3 includes a second lens 34 and a support portion 35 that supports the second lens 34. The support portion 35 has light diffusibility. In a cross section including the central axis 20 of the first lens 2 along the normal line of the light-emitting surface 11, the lower end 215 of the second emission surface 213 is located at the same position as the upper end 351 of the support portion 35 in the direction in which the central axis 20 extends, or is located closer to the first emission surface 212 than the upper end 351 of the support portion 35. In the example shown in FIG. 11, the lower end 215 is located at approximately the same position as the upper end 351 in the direction in which the central axis 20 extends. These points are mainly different from the third modification.

[0088] In the light-emitting module 100d, the light-transmissive member 3 includes the support portion 35, so that the light L6 emitted from the light source 1, incident on the first lens 2 from the first entrance surface 211, and then reflected on the flat portion 214 of the first exit surface 212 can be reflected on the upper end 351 of the support portion 35. Since the support portion 35 has light diffusion properties, a part of the light L6 is diffused on the upper end 351 of the support portion 35. In the light-emitting module 100d, the light L7 diffused on the upper end 351 is emitted from the first cylindrical surface 322 to the +Z side. A part of the light L6 is reflected and diffused on the upper end 351 of the support portion 35, so that the illuminance unevenness of the light emitted from the light-emitting module 100d can be reduced. In addition, in the light-emitting module 100d, the light that becomes stray light from the first cylindrical surface 322 toward the -Z side can be reduced.

[0089] Furthermore, in a cross section including central axis 20, lower end 215 is located at the same position as upper end 351 in the direction in which central axis 20 extends, or is located closer to first emission surface 212 than upper end 351, so that light L2 emitted from second emission surface 213 is not blocked by support portion 35. This makes it possible to reduce optical loss caused by light L2 being blocked by support portion 35 in light-emitting module 100d.

[0090] The support 35 may contain a light diffusing material therein. Examples of the light diffusing material that may be used include titanium oxide, barium titanate, aluminum oxide, and silicon oxide. In the light-emitting module 100d, the support 35 contains a light diffusing material therein, so that the support 35 can easily be imparted with light diffusing properties.

[0091] In the example shown in FIG. 11, in the light emitting module 100d, the second lens 34 and the support portion 35 are molded bodies directly bonded at their respective interfaces. More specifically, the second lens 34 is composed of a resin having translucency. The support portion 35 is composed of a resin having translucency and containing a light diffusing material. The translucency of the second lens 34 and the support portion 35 is preferably a property having a light transmittance of 60% or more for the light emitted from the light source 1. In the example shown in FIG. 11, in the support portion 35, the resin serving as the base material containing the light diffusing material is the same as the resin constituting the second lens 34. The second lens 34 and the support portion 35 constituting the molded body directly bonded at their respective interfaces can be manufactured by, for example, two-color molding. In the light emitting module 100d, the second lens 34 and the support portion 35 constituting the molded body directly bonded at their respective interfaces are used, so that the light emitting module 100d can be easily assembled.

[0092] In addition, in the support portion 35, the resin serving as the base material containing the light diffusing material may be different from the resin constituting the second lens 34. In addition, the support portion 35 is not limited to one containing the light diffusing material inside. The support portion 35 may be a member having a light diffusing material disposed on its surface. In this case, in the light-emitting module 100d, the support portion 35 can easily be given light diffusibility by using a member having a surface coated with a light diffusing material as the support portion 35, for example.

[0093] Effects of the light-emitting module 100d other than those described above are similar to those of the light-emitting module 100 according to the first embodiment.

[0094] <Fifth Modification> A light emitting module according to the fifth modification will be described with reference to Figs. 12 and 13. Fig. 12 is a schematic cross-sectional view showing an example of a first lens 2e included in the light emitting module according to the fifth modification. Fig. 12 shows a schematic cross-sectional view of the first lens 2e including the central axis 20 of the first lens 2e. Fig. 13 is a schematic cross-sectional view showing an example of a light emitting module 100e according to the fifth modification. Note that a top view of the light emitting module 100e is almost the same as the top view of the light emitting module 100 shown in Fig. 1. Fig. 13 shows a schematic cross-section of the light emitting module 100e corresponding to the line II-II in Fig. 1.

[0095] In this modified example, the first lens 2e differs mainly from the first lens 2 provided in the light-emitting module 100 according to the first embodiment in that, when viewed from above, the connection surface 221 arranged on the outside of the first lens 2e is located lower than the first incident surface 211 in the direction along the central axis 20.

[0096] 12, the connection portion 22e includes a connection surface 221 that is disposed on the outer side of the first lens 2e in a top view. In the example shown in Fig. 13, the connection surface 221 is disposed to face the step portion 323 of the light-transmitting member 3, and the connection surface 221 and the step portion 323 are joined by the adhesive member 24. In the light-emitting module 100e, the connection surface 221 is located below the first incident surface 211 in the direction along the central axis 20.

[0097] 2, the connection surface 221 is located at approximately the same position as the outer edge of the first incident surface 211 in the direction along the central axis 20. The connection surface 221 and the step portion 323 of the light-transmitting member 3 are joined by an adhesive member 24. In this case, a part of the light L2 totally reflected by the first incident surface 211 may be incident on the adhesive member 24 joining the connection surface 221 and the step portion 323 and may be blocked by the adhesive member 24. If a part of the light L2 is blocked by the adhesive member 24, an optical loss may occur in the light L2 emitted from the first cylindrical surface 322.

[0098] In the light-emitting module 100e, the connection surface 221 is located below the first incident surface 211 in the direction along the central axis 20, and therefore it is possible to reduce the blocking of the light L2 totally reflected by the first incident surface 211 by the adhesive member 24 that joins the connection surface 221 and the step portion 323. This makes it possible to reduce the optical loss of the light L2 emitted from the first cylindrical surface 322.

[0099] Effects of the light emitting module 100e other than those described above are similar to those of the light emitting module 100 according to the first embodiment.

[0100] <Sixth Modification> Fig. 14 is a schematic cross-sectional view showing an example of a light-transmitting member 3f included in a light-emitting module according to a sixth modified example. Fig. 14 shows a schematic cross-section of the light-transmitting member 3f including a central axis 30 of the light-transmitting member 3f. The central axis 30 of the light-transmitting member 3f is an axis along the normal to the light-emitting surface 11 of the light source 1 shown in Fig. 2.

[0101] In this modification, the light-transmitting member 3f is different from the light-emitting unit 10 according to the first embodiment in that a curved surface 36 that is continuous with the upper surface 311 and the first cylindrical surface 322 is provided between the upper surface 311 and the first cylindrical surface 322. From another perspective, the curved surface 36 is provided on the entire circumference of the upper surface 311. In the example shown in FIG. 14, the curved surface 36 is a surface that has a curvature in a cross-sectional view. In addition, since the shape of the light-transmitting member 3f in a top view is substantially circular, the curved surface 36 is also a surface that has a curvature in a top view.

[0102] By providing the curved surface 36 on the entire periphery of the upper surface 311, it is possible to control the light emitted from the curved surface 36 according to the curvature of the curved surface 36. This makes it possible to increase the degree of freedom in controlling the light distribution of the light emitted from the light-emitting module including the light-transmitting member 3f. The magnitude of the curvature of the curved surface 36 can be appropriately changed according to the requirements for light control by the curved surface 36.

[0103] Effects of the light emitting module according to the sixth embodiment other than those described above are similar to those of the light emitting module 100 according to the first embodiment.

[0104] 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.

[0105] 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.

[0106] The light-emitting module of the present disclosure is capable of emitting light with a wide-angle light distribution, and therefore can be suitably used as lighting, camera flashes, vehicle headlights, disaster lights that widely illuminate the feet, etc. However, the light-emitting module of the present disclosure is not limited to the uses described above.

[0107] Aspects of the present disclosure are, for example, as follows. <Item 1> A light emitting module comprising: a light source including a light emitting surface; a first lens disposed opposite to the light source; and a light-transmitting member disposed opposite to the first lens and transmitting light emitted from the first lens, wherein the first lens has a concave lens including a first entrance surface through which light from the light source is incident, a first exit surface located opposite the first entrance surface, and a second exit surface constituting a part of a side surface, and the light-transmitting member includes an upper surface located above the first exit surface and a first cylindrical surface located outside the first lens in a top view, the first exit surface includes a first total reflection portion that totally reflects the light incident from the first entrance surface, and the first entrance surface includes a second total reflection portion that totally reflects the light totally reflected at the first total reflection portion, and the light totally reflected at the second total reflection portion can be emitted from the first cylindrical surface via the second exit surface. <Item 2> The light emitting module according to <Item 1>, wherein the first lens is a rotationally symmetric body. <Item 3> The light emitting module according to <Item 1> or <Item 2>, wherein the second exit surface of the first lens includes a second cylindrical surface. <Item 4> The light-emitting module described in any one of <Item 1> to <Item 3>, wherein in a cross section including a central axis of the first lens along the normal to the light-emitting surface, the first entrance surface of the first lens includes a first convex portion that is convex toward the light source on one side across the central axis of the first lens, and includes a second convex portion that is convex toward the light source on the other side across the central axis of the first lens. <Item 5> The light emitting module according to any one of <Item 1> to <Item 4>, wherein the first lens includes a biconvex lens at a position overlapping with a central axis of the first lens. <Item 6> The light-emitting module described in any one of <Item 1> to <Item 5>, wherein the second exit surface of the first lens is inclined so as to approach a central axis of the first lens along the normal to the light-emitting surface as it moves away from the light-emitting surface. <Item 7> The light-emitting module according to any one of <Item 1> to <Item 6>, wherein the light-transmitting member includes a second lens, the second lens including a second entrance surface facing the first exit surface of the first lens, and the second entrance surface includes unevenness. <Item 8> The light-emitting module described in any one of <Item 1> to <Item 7>, wherein the light-transmitting member includes a second lens and a support portion supporting the second lens, the support portion having light diffusibility, and in a cross section including a central axis of the first lens along a normal to the light-emitting surface, a lower end of the second light-emitting surface is at the same position as an upper end of the support portion in a direction in which the central axis extends, or is located closer to the first light-emitting surface than the upper end of the support portion. <Item 9> The light source is a light emitting module described in any one of <Item 1> to <Item 8>, wherein the light source includes at least one light emitting unit, the light emitting unit having a light emitting element, a wavelength conversion member arranged on the light emitting element, and a covering member covering each of a side surface of the light emitting element and a side surface of the wavelength conversion member. <Item 10> The light emitting module according to <Item 9>, wherein the light source includes a plurality of the light emitting units, and the covering member integrally holds a plurality of the light emitting elements and a plurality of the wavelength conversion members. <Item 11> A flash light source, <10> 1 is a light-emitting module according to any one of the above items. <Item 12> A smartphone including the light emitting module according to any one of <Item 1> to <Item 11>. <Item 13> The light emitting module is the smartphone according to <Item 12>, wherein at least a part of the second emission surface of the first lens is disposed to protrude from a housing of the smartphone. [Explanation of symbols]

[0108] 1 light source 10, 10-1 to 10-9 Light emitting part 11, 11-1 to 11-9 Light-emitting surface 12 Light emitting element 13 electrodes 14 Wavelength conversion material 15 Covering material 16 Light-emitting surface 2, 2e First lens 20 center axis 21 Concave Lens 210 1st total reflection section 220 2nd total reflection section 211 1st entrance plane 212 First exit surface 213 Second exit surface 214 Plane section 215 Bottom end 216 Concave 22 Connection 221 Connection Surface 23 Biconvex Lens 231 First protrusion 232 Second convex part 24 Adhesive material 3 Translucent material 30 center axis 31 Top 311 Top surface 312 Bottom surface 32 Cylindrical section 321 Inner surface 322 First cylindrical surface 323 Step 33 Legs 34 Second lens 341 2nd entrance plane 342 Unevenness 35 Support part 351 Upper end 36 Curved surface 4. Wiring board 40 center axis 41 Wiring 42 Conductive materials 51 Convex Lens 52 Lens support 100, 100a~100e Light emitting module 200, 200-1 to 200-3 Imaging device 300 Case 400 Face Camera 500 Display 501 Shooting button 1000 Smartphones dx First light emitting surface distance dy Second light emitting surface distance L, L1~L7 light Wx 1st width Wy Second width

Claims

1. a light source including a light emitting surface; A first lens disposed opposite the light source; a light-transmitting member disposed opposite the first lens and transmitting light emitted from the first lens; the first lens has a concave lens including a first entrance surface through which light from the light source is incident, a first exit surface located opposite to the first entrance surface, and a second exit surface constituting a part of a side surface, the light-transmitting member includes an upper surface located above the first emission surface and a first cylindrical surface located outside the first lens in a top view, the first exit surface includes a first total reflection portion that totally reflects the light incident from the first entrance surface, the first incident surface includes a second total reflection portion that totally reflects the light totally reflected by the first total reflection portion, a light emitting module capable of emitting light totally reflected by the second total reflection portion from the first cylindrical surface via the second exit surface.

2. The light emitting module according to claim 1 , wherein the first lens is a rotationally symmetric body.

3. The light emitting module of claim 1 , wherein the second exit surface of the first lens comprises a second cylindrical surface.

4. 2. The light-emitting module of claim 1, wherein in a cross section including a central axis of the first lens along a normal to the light-emitting surface, the first incident surface of the first lens includes a first convex portion that is convex toward the light source on one side of the central axis of the first lens, and a second convex portion that is convex toward the light source on the other side of the central axis of the first lens.

5. The light emitting module according to claim 1 , wherein the first lens includes a biconvex lens at a position overlapping a central axis of the first lens.

6. The light emitting module according to claim 1 , wherein the second exit surface of the first lens is inclined so as to approach a central axis of the first lens along a normal to the light emitting surface as the second exit surface becomes farther from the light emitting surface.

7. the light-transmitting member includes a second lens, the second lens includes a second entrance surface facing the first exit surface of the first lens, The light emitting module according to claim 1 , wherein the second light input surface includes projections and recesses.

8. the light-transmitting member includes a second lens and a support portion that supports the second lens, The support portion has a light diffusive property, 2. The light-emitting module of claim 1, wherein in a cross section including a central axis of the first lens along a normal to the light-emitting surface, a lower end of the second exit surface is at the same position as an upper end of the support portion in the direction in which the central axis extends, or is located closer to the first exit surface than the upper end of the support portion.

9. The light source includes at least one light emitting portion, The light emitting module according to claim 1 , wherein the light emitting section comprises a light emitting element, a wavelength conversion member arranged on the light emitting element, and a covering member covering each of a side surface of the light emitting element and a side surface of the wavelength conversion member.

10. The light source includes a plurality of the light emitting units, The light emitting module according to claim 9 , wherein the covering member integrally holds the plurality of light emitting elements and the plurality of wavelength converting members.

11. 10. The lighting module of claim 1, which is a flash light source.

12. A smartphone comprising the light emitting module according to any one of claims 1 to 11.

13. The smartphone according to claim 12 , wherein the light emitting module is disposed such that at least a part of the second light exit surface of the first lens protrudes from a housing of the smartphone.

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