Lens and light-emitting module

Abstract

To provide a lens and light-emitting module capable of controlling light distribution. [Solution] The lens has a first light-transmitting portion comprising a light-incident surface and a light-emitting surface located on the opposite side of the light-incident surface, the first light-transmitting portion being provided with a through hole continuous with the light-incident surface and the light-emitting surface, and at least one of the light-incident surface and the light-emitting surface including at least one annular protrusion arranged to surround the through hole in a top view.

Description

[Technical Field]

[0001] This disclosure relates to lenses and light-emitting modules. [Background technology]

[0002] Conventionally, light-emitting modules having semiconductor elements such as LEDs (Light Emitting Diodes) have been widely used. As a lens used in such a light-emitting module, for example, Patent Document 1 discloses a lens structure in which a through hole is provided that penetrates along the optical axis of a convex lens. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2018-142506 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] The embodiments relating to this disclosure aim to provide a lens and light-emitting module capable of controlling light distribution. [Means for solving the problem]

[0005] A lens according to one embodiment of the present disclosure has a first light-transmitting portion comprising a light-incident surface and a light-emitting surface located opposite to the light-incident surface, wherein the first light-transmitting portion is provided with a through hole continuous with the light-incident surface and the light-emitting surface, and at least one of the light-incident surface and the light-emitting surface includes at least one annular protrusion arranged to surround the through hole in a top view.

[0006] A light-emitting module according to one embodiment of the present disclosure includes, in a top view, a first light-emitting unit located in a central region and a second light-emitting unit located in an outer peripheral region arranged on the outer periphery of the central region, and comprises a light source in which the first light-emitting unit and the second light-emitting unit can be individually driven, and a lens positioned above the light source, wherein, in a top view, the light source is positioned such that the first light-emitting unit overlaps the through-hole, light emitted from the first light-emitting unit is irradiated through the through-hole at a first half-value full angle, and light emitted from the second light-emitting unit is irradiated through the annular protrusion at a second half-value full angle, the first half-value full angle being smaller than the second half-value full angle. [Effects of the Invention]

[0007] According to embodiments of this disclosure, it is possible to provide a lens and a light-emitting module capable of controlling light distribution. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic top view of a light-emitting module having a lens according to the first embodiment. [Figure 2] This is a schematic cross-sectional view along line II-II in Figure 1. [Figure 3] This figure shows the behavior of light emitted from a light-emitting module having a lens according to the first embodiment. [Figure 4] This is a schematic top view showing the configuration of a light source in a light-emitting module having a lens according to the first embodiment. [Figure 5] Figure 4 is a schematic cross-sectional view along the VV line. [Figure 6] This is a schematic top view of a light-emitting module according to a modified example of the first embodiment. [Figure 7] This is a schematic cross-sectional view along the line VII-VII in Figure 6. [Figure 8] This is a schematic top view of a light-emitting module having a lens according to the second embodiment. [Figure 9] Figure 8 is a schematic cross-sectional view along the line IX-IX, showing the behavior of light emitted from the lens according to the second embodiment. [Figure 10] It is a schematic top view of a light emitting module having a lens according to the third embodiment. [Figure 11] It is a schematic cross-sectional view taken along the line XI-XI of FIG. 10, and is a diagram showing the behavior of light emitted from the lens according to the third embodiment. [Figure 12] It is a diagram for explaining the irradiation angle of light emitted from the light source.

Embodiments for Carrying out the Invention

[0009] The lens and the light emitting module according to the embodiments of the present disclosure will be described in detail with reference to the drawings. However, the embodiments shown below are examples of the lens and the light emitting module for embodying the technical idea of the present embodiment, and are not limited thereto. In addition, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments are not intended to limit the scope of the present disclosure only to a specific form, unless there is a description to that effect, and are merely illustrative examples. Note that the sizes, positional relationships, etc. of the members shown in each drawing may be exaggerated for clarity of explanation. In the following description, the same names and reference numerals indicate the same or equivalent members, and detailed descriptions will be omitted as appropriate. As a cross-sectional view, an end view showing only the cut surface may be used.

[0010] In the figures shown below, the directions may be indicated by the X-axis, Y-axis, and Z-axis. The X-axis, Y-axis, and Z-axis are directions perpendicular to each other. The X-direction along the X-axis and the Y-direction along the Y-axis shall indicate the directions along the light emitting surface of the light emitting part provided in the light emitting module according to the embodiment. The Z-direction along the Z-axis shall indicate the direction perpendicular to the light emitting surface. That is, the light emitting surface of the light emitting part is parallel to the XY plane, and the Z-axis is perpendicular to the XY plane.

[0011] 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 emitting unit included in the light emitting module emits light to the +Z side as an example. However, these do not limit the orientation when using the lens and the light emitting module according to the embodiment, and the orientation of the lens and the light emitting module according to the embodiment is arbitrary.

[0012] In this specification, the surface of the object when viewed from the +Z side is referred to as the "upper surface", and the surface of the object when viewed from the -Z side is referred to as the "lower surface". The +Z side when viewed from the object may be referred to as "above", and the -Z side when viewed from the object may be referred to as "below". In the embodiments shown below, along the X-axis, Y-axis and Z-axis includes that the object has an inclination within the range of ±10° with respect to these axes. In this embodiment, orthogonal may include an error within ±10° with respect to 90°. In this specification, "along" may include an error within ±10° with respect to 0°. Also, "arrange" is not limited to the case where two objects are in contact with each other, and also includes the case where one object is arranged on another object indirectly, for example, through other members. "Thickness" represents the length of the object in the Z direction.

[0013] In this specification or the claims, when there are a plurality of certain components and they are expressed separately for distinction, "first", "second", etc. may be appended to the heads of those components for distinction. Also, the objects to be distinguished may be different between this specification and the claims.

[0014] [First Embodiment] [Configuration of a Light Emitting Module Having a Lens According to the First Embodiment] The configuration of the light-emitting module having a lens according to the first embodiment will be described with reference to Figures 1 to 5. Figure 1 is a schematic top view of the light-emitting module 100 having a lens 2 according to the first embodiment. Figure 2 is a schematic cross-sectional view taken along line II-II in Figure 1. Figure 3 is a diagram showing the behavior of light emitted from the light-emitting module 100 having a lens 2 according to the first embodiment. Figure 4 is a schematic top view showing the configuration of the light source 1 in the light-emitting module 100 having a lens 2 according to the first embodiment. Figure 5 is a schematic cross-sectional view taken along line VV in Figure 4.

[0015] The light-emitting module 100 is, for example, a light-emitting module used in the flash light source of an imaging device mounted on a smartphone, or in the flashlight function of a smartphone. The imaging device includes cameras that take still images and video cameras that shoot videos.

[0016] As shown in Figures 1 and 2, the light-emitting module 100 includes a light source 1 and a lens 2 positioned above the light source 1.

[0017] Furthermore, in the examples shown in Figures 1 and 2, the light-emitting module 100 further comprises a substrate 4 on which the light source 1 and lens 2 are arranged, and an adhesive member 5. The lens 2 is bonded to the upper surface 41 of the substrate 4 by the adhesive member 5.

[0018] In the example shown in Figure 1, the outer shape of the light-emitting module 100 is approximately circular when viewed from above. In a top view, the outer shape of the lens 2 is the same as the outer shape of the light-emitting module 100. In the example shown in Figure 1, the outer shape of the lens 2 is approximately circular when viewed from above. However, the outer shapes of the light-emitting module 100 and the lens 2 are not limited to approximately circular when viewed from above, and may be other shapes such as approximately elliptical, approximately rectangular, or approximately polygonal.

[0019] Light source 1 is mounted on the upper surface 41 of substrate 4. In the examples shown in Figures 1 and 4, the outer shape of light source 1 in a top view is approximately rectangular. Light source 1 comprises multiple light-emitting units. Light source 1 comprises 25 light-emitting units 1B, each having an approximately rectangular light-emitting surface 10. The 25 light-emitting units 1B are arranged in a 5x5 matrix. The light-emitting surface 10 refers to the main light extraction surface of the light-emitting unit 1B. Therefore, the light-emitting surface 10 of the light-emitting unit 1B is also the light-emitting surface of light source 1. The region including the light-emitting surface 10 corresponds to the light-emitting region 1A. When light source 1 includes multiple light-emitting surfaces 10, the light-emitting region 1A is the region formed by connecting the outer edges of the light-emitting surfaces 10 located on the outside in a top view. In the example shown in Figure 4, the light-emitting region 1A is composed of 25 light-emitting surfaces 10. The shape of the outer edge of the light-emitting region 1A in a top view is approximately rectangular and includes four corners 1K. Furthermore, the number of light-emitting units 1B included in the light source 1 is not limited to 25; at least 2 are sufficient. The light source 1 is not limited to a rectangle when viewed from above; it may also have other shapes such as a roughly circular, roughly elliptical, or roughly polygonal shape.

[0020] The light source 1 includes a first light-emitting unit 1-1 located in the central region when viewed from above, and a second light-emitting unit 1-2 located in the outer peripheral region, which is positioned around the outer periphery of the central region. In the example shown in Figure 1, the light source 1 has 25 light-emitting units 1B, and more specifically, it includes one first light-emitting unit 1-1 and 24 second light-emitting units 1-2 arranged in the outer peripheral region so as to surround the entire circumference of the first light-emitting unit 1-1. The central region is the region that overlaps with the center 1AC of the light-emitting region 1A when viewed from above. Note that the central region may have multiple first light-emitting units 1-1, and multiple first light-emitting units 1-1 may be arranged in a matrix.

[0021] As shown in Figure 2, in this embodiment, the lens 2 has a first light-transmitting portion 20 comprising a light incident surface 21 and a light-emitting surface 22 located on the opposite side of the light incident surface 21. In the example shown in Figure 2, the lens 2 also has a first support portion 25 that supports the first light-transmitting portion 20. The first support portion 25 is bonded to the upper surface 41 of the substrate 4 by an adhesive member 5. In this embodiment, in a top view, the center 1AC of the light-emitting region 1A coincides with the central axis 20C of the first light-transmitting portion 20. The light source 1 emits light from the light-emitting surfaces 10 included in each of the plurality of light-emitting portions 1B in the direction in which the first light-transmitting portion 20 is located. The first light-transmitting portion 20 is provided with a through hole 23 that is continuous with the light incident surface 21 and the light-emitting surface 22. In the example shown in Figures 1 and 2, the light incident surface 21 includes two annular protrusions 24 arranged to surround the through hole 23 in a top view. The annular protrusions 24 are circular rings centered on the central axis 20C of the first light-transmitting portion 20, and the two annular protrusions 24 are arranged concentrically. The annular protrusions 24 arranged to surround the through-hole 23 in a top view may be provided on the light-emitting surface 22. Furthermore, the annular protrusions 24 may be provided on both the light-incident surface 21 and the light-emitting surface 22. The number of annular protrusions 24 is not particularly limited; at least one is sufficient. In Figures 1 to 3, the central axis 20C of the first light-transmitting portion 20, the central axis 23C of the through-hole 23, and the center 1AC of the light-emitting region 1A of the light source 1 overlap with each other. Therefore, the reference numerals for the central axis 20C, central axis 23C, and center 1AC are shown together. In subsequent figures, reference numerals may also be shown together for the same purpose.

[0022] As shown in Figure 2, the light incident surface 21 includes an annular convex surface 211 surrounding the through hole 23 in a top view. The light emission surface 22 includes an annular convex surface 221 surrounding the through hole 23 in a top view. The annular convex portion 24 is positioned on the light incident surface 21 and surrounds the annular convex surface 211 in a top view. The annular convex portion 24 includes an inner surface 24a and an outer surface 24b, at least one of which is capable of refracting or reflecting light. Also, as shown in Figure 1, the annular convex portion 24 and the corner 1K of the light-emitting region 1A of the light source 1 overlap.

[0023] In the example shown in Figure 2, the through-hole 23 includes a first aperture 231 located on the light incident surface 21 side and a second aperture 232 located on the light exit surface 22 side. In a direction along the central axis 23C of the through-hole 23, passing through the center 231C of the first aperture 231 and the center 232C of the second aperture 232, for example in the Z direction, the first aperture 231 is located between the annular protrusion 24 and the second aperture 232. For example, the first aperture 231 is located between the top 24t of the annular protrusion 24 and the second aperture 232. If there are multiple annular protrusions 24, the first aperture 231 is located between the top 24t of the protrusion 24 closest to the through-hole 23 and the second aperture 232.

[0024] The first light-emitting unit 1-1 and the second light-emitting unit 1-2 are individually drivable. Furthermore, the 24 second light-emitting units 1-2 include multiple individually drivable light-emitting units. In other words, the light source 1 may be driven individually by the multiple second light-emitting units 1-2, or by multiple groups. If the light source 1 includes multiple first light-emitting units 1-1, each of the multiple first light-emitting units 1-1 may be driven individually, or by multiple groups. Each of the one first light-emitting unit 1-1 and the 24 second light-emitting units 1-2 emits light toward a lens 2 located above the light source 1.

[0025] By controlling the distribution of current supplied to each of the first light-emitting unit 1-1 and the 24 second light-emitting units 1-2, the light distribution of the light emitted from the light-emitting module 100 can be controlled.

[0026] The light-emitting module 100 can increase the contrast of the illuminated light on the illuminated surface S, which is illuminated by light from the light source 1, by individually lighting the first light-emitting unit 1-1 and the 24 second light-emitting units 1-2 at a desired brightness, or by lighting them in groups. Furthermore, the light-emitting module 100 can partially illuminate the illuminated surface S by individually lighting the first light-emitting unit 1-1 and the 24 second light-emitting units 1-2, or by lighting them in groups. Here, partial illumination means illuminating a part of the illuminated surface S with light.

[0027] When the light-emitting module 100 is used as a light source for the flash of an imaging device, for example, the light emitted from the light-emitting module 100 can be switched between a wide-angle mode and a narrow-angle mode. The wide-angle mode is a mode in which only some of the 24 second light-emitting units 1-2 are emitted, a mode in which all 24 second light-emitting units 1-2 are emitted, or a mode in which all 24 second light-emitting units 1-2 and the first light-emitting unit 1-1 are emitted, and the light emitted from the light-emitting module 100 has a wide-angle distribution. Furthermore, by adjusting the intensity of the light from the first light-emitting unit 1-1 and the second light-emitting unit 1-2, the light-emitting module 100 can emit a wide-angle distribution and an ultra-wide-angle distribution with a wider distribution than the wide-angle distribution. In the following description, the wide-angle distribution and the ultra-wide-angle distribution may be collectively referred to as wide-angle distribution or wide-angle mode. The narrow-angle mode is a mode in which some of the 24 second light-emitting units 1-2 and the first light-emitting unit 1-1 are illuminated, or a mode in which only the first light-emitting unit 1-1 is illuminated and the second light-emitting units 1-2 are not illuminated, and the light emitted from the light-emitting module 100 has a narrow-angle distribution. In other words, the narrow-angle mode has a narrower beam angle than the wide-angle mode.

[0028] Because the light-emitting module 100 can switch between wide-angle and narrow-angle modes, for example, the light emitted from the light-emitting module 100 can be used by an imaging device to take close-up or telephoto shots according to the shooting mode. Furthermore, when the light-emitting module 100 is used as a light source for a smartphone flashlight, setting the light emitted from the light-emitting module 100 to narrow-angle mode allows the light to reach further, improving the performance of the flashlight.

[0029] In this embodiment, the first light-transmitting portion 20 of the lens 2 is provided with a through-hole 23. The light incident surface 21 includes a plurality of annular protrusions 24 arranged to surround the through-hole 23 when viewed from above. This configuration makes it possible to make the light distribution different between the light that passes through the through-hole 23 and the light that passes through the portion of the first light-transmitting portion 20 other than the through-hole 23, from the light emitted from the light source 1. In this embodiment, by making the light distribution of the light that passes through the through-hole 23 and the light that passes through the portion other than the through-hole 23 different, a lens 2 capable of controlling light distribution can be provided. Furthermore, in this embodiment, a light-emitting module 100 having the lens 2 and capable of controlling light distribution can be provided.

[0030] In the lens 2 and light-emitting module 100, narrow-angle mode light is irradiated through the through-hole 23, resulting in a higher illuminance of narrow-angle mode light compared to the case where light is irradiated from a light-emitting module that does not have a through-hole 23. Furthermore, in this embodiment, wide-angle mode light is irradiated through the annular protrusion 24, enabling the irradiation of light with a wider beam angle compared to the case where light is irradiated from a light-emitting module that does not have an annular protrusion.

[0031] The light incident surface 21 includes an annular convex surface 211, and the light emission surface 22 includes an annular convex surface 221. The annular convex portion 24 is positioned on the light incident surface 21 and surrounds the annular convex surface 211 when viewed from above. The annular convex portion 24 includes an inner surface 24a and an outer surface 24b. At least one of the inner surface 24a and the outer surface 24b of the annular convex portion 24 is capable of refracting or reflecting light. The annular convex portion 24 is positioned closer to the second light-emitting portion 1-2 than to the first light-emitting portion 1-1. With this configuration, the light emitted from the second light-emitting portion 1-2 is refracted or reflected by the annular convex portion 24, thus increasing the utilization efficiency of the light emitted from the second light-emitting portion 1-2 located in the outer peripheral region of the light source 1. Therefore, in light distribution control, the utilization efficiency of light is mainly increased in wide-angle mode.

[0032] The through-hole 23 includes a first opening 231 and a second opening 232. In the direction along the central axis 23C of the through-hole 23, the first opening 231 is located between the annular protrusion 24 and the second opening 232. This allows a recess to be formed by the annular protrusion 24 and the light incident surface 21 (annular convex surface 211). By positioning the light-emitting region 1A of the light source 1 inside this recess, the distance between the first light-emitting unit 1-1 and the first opening 231 can be reduced. This makes it easier for the light emitted by the first light-emitting unit 1-1 to pass through the through-hole 23, and reduces the amount of light emitted by the first light-emitting unit 1-1 that is refracted or reflected by the annular protrusion 24. As a result, the illuminance of the narrow-angle mode light increases.

[0033] As shown in Figure 1, the light source 1 is positioned such that, in a top view, the first light-emitting section 1-1 overlaps with the through-hole 23. In Figure 3, the light rays corresponding to the angle at which the illuminance on the irradiation surface S is halved, out of the light L1 emitted from the first light-emitting section 1-1, are shown by solid arrows. The light rays corresponding to the angle at which the illuminance on the irradiation surface S is halved, out of the light L2 emitted from the second light-emitting section 1-2, are shown by dashed arrows. As shown in Figure 3, the light L1 emitted from the first light-emitting section 1-1 is irradiated through the through-hole 23 at a first half-value full angle θ1. The light L2 emitted from the second light-emitting section 1-2 is irradiated through the annular protrusion 24 at a second half-value full angle θ2. The first half-value full angle θ1 is smaller than the second half-value full angle θ2. This makes it possible to make the light distribution of light L1 and light L2 different, and provides a light-emitting module 100 that allows for light distribution control.

[0034] As shown in Figure 3, of the light L2 emitted from the second light-emitting section 1-2, the light L2 irradiated through the annular protrusion 24 travels toward the central axis 20C of the first light-transmitting section 20 and irradiates the irradiation surface S. Multiple light rays contained in the light L2 travel toward the central axis 20C of the first light-transmitting section 20 and intersect with each other on the central axis 20C. This allows the beam angle of the light L2 irradiated through the annular protrusion 24 to be controlled to be large. Note that "intersecting with each other on the central axis 20C" does not need to be a strict intersection and may include errors that may occur during the manufacturing process.

[0035] The second light-emitting unit 1-2 includes a plurality of individually driveable light-emitting units. By individually emitting light from the plurality of light-emitting units, the degree of freedom in controlling the light distribution, including wide-angle and narrow-angle modes, is increased.

[0036] In a top view, the light incident surface 21 and the light emission surface 22 each include annular convex surfaces 211 and 221 surrounding the through hole 23. The annular convex portion 24 surrounds the annular convex surface 211 and is positioned on the light incident surface 21. The corners 1K of the rectangular light-emitting region 1A overlap with the annular convex portion 24. By positioning the annular convex portion 24 (especially the top 24t of the annular convex portion 24) near the outer edge of the light-emitting region 1A and positioning the outer surface 24b outside the corners 1K of the light-emitting region 1A in order to achieve a wide-angle light distribution from the light-emitting module 100, the efficiency of light capture by the annular convex portion 24 from the light source 1 is increased.

[0037] The following describes in detail each component of the light-emitting module 100.

[0038] (Light source 1) The light source 1 will be described with reference to Figures 4 and 5. The light source 1 of this embodiment includes a light-emitting unit 1B, which includes a first light-emitting unit 1-1 and a second light-emitting unit 1-2, and a base body 18. The base body 18 has a first wiring member 17 on its upper surface and a second wiring member 19 on its lower surface. The light source 1 has one first light-emitting unit 1-1 and 24 second light-emitting units 1-2. The first light-emitting unit 1-1 is located in the central region of the light source 1 when viewed from above. The second light-emitting units 1-2 are arranged vertically, horizontally, or in a matrix when viewed from above. In Figure 4, in order to distinguish between the one first light-emitting unit 1-1 and the 24 second light-emitting units 1-2, the first light-emitting unit 1-1 is shown in white and the second light-emitting units 1-2 are shown with dot hatching. Furthermore, in Figure 4, to avoid making the diagram complex, only the second light-emitting unit 1-2 located in the 3rd row and 1st column of the 24 second light-emitting units 1-2 is labeled with a reference numeral.

[0039] The light source 1 includes the light-emitting surface 10 of the light-emitting unit 1B on its upper surface, and is positioned on the +Z side of the substrate 4 with the side opposite to the light-emitting surface 10 as the mounting surface. The one first light-emitting unit 1-1 and the 24 second light-emitting units 1-2 all have almost the same configuration. Therefore, in the following description, the configuration of the second light-emitting unit 1-2 located in the 3rd row and 1st column may be used as a representative example.

[0040] In the example shown in Figure 5, the second light-emitting unit 1-2 includes a light-emitting element 14, a wavelength conversion member 13 positioned above the light-emitting element 14, a light-diffusing member 12 positioned above the wavelength conversion member 13, and a first covering member 11 positioned above the light-diffusing member 12. The second light-emitting unit 1-2 also includes a second covering member 15 that covers the sides of the first covering member 11, the light-diffusing member 12, the wavelength conversion member 13, and the light-emitting element 14.

[0041] The light-emitting element 14 has at least one pair of positive and negative electrodes 16 on the side opposite to the light-emitting surface 10, i.e., the bottom surface. The light-emitting element 14 is placed on the substrate 18 via the electrodes 16 and the first wiring member 17. The sides of each of the electrodes 16 and the first wiring member 17, as well as the bottom surface of the light-emitting element 14, are covered with a resin member 150. The resin member 150 absorbs external forces applied to the light-emitting element 14 from the outside during the manufacturing process, thereby reducing the external forces applied to the light-emitting element 14.

[0042] The substrate 18 has wiring on its surface, or both on its surface and inside. The first wiring member 17 and the second wiring member 19 are the wiring of the substrate 18. The light source 1 and the substrate 4 are electrically connected by conductive materials such as bumps and solder connecting the electrodes 16 of the light-emitting element and the wiring of the substrate 4 via the first wiring member 17, the substrate 18, and the second wiring member 19. The configuration and size of the wiring of the substrate 4 are set according to the configuration and size of the electrodes 16 of the light-emitting element 14.

[0043] The second covering member 15 integrally holds a plurality of first covering members 11, a plurality of light diffusing members 12, a plurality of wavelength conversion members 13, and a plurality of light-emitting elements 14. In the example shown in Figure 5, the second covering member 15 is positioned on the sides of the first covering members 11, light diffusing members 12, wavelength conversion members 13, and light-emitting elements 14. It is positioned between adjacent first covering members 11, between adjacent light diffusing members 12, between adjacent wavelength conversion members 13, and between adjacent light-emitting elements 14. The second covering member 15 integrally holds the first covering member 11, light diffusing member 12, wavelength conversion member 13, and light-emitting element 14 of the first light-emitting unit 1-1, and the first covering member 11, light diffusing member 12, wavelength conversion member 13, and light-emitting element 14 of each of the 24 second light-emitting units 1-2. A portion of the upper surface of the second covering member 15 constitutes the upper surface of the light source 1. Furthermore, the second covering member 15 includes two long sides and two short sides, and these four sides constitute the roughly rectangular outer shape of the light source 1 when viewed from above.

[0044] By having a light source 1 comprise one first light-emitting unit 1-1 and multiple second light-emitting units 1-2, the degree of freedom in the light patterns that can be emitted from the light source 1 is increased. Furthermore, by having the second covering member 15 integrally hold multiple light-emitting units 14 and multiple wavelength conversion members 13, the mounting of the light source 1 becomes easier.

[0045] The light-emitting element 14 has various semiconductors such as III-V compound semiconductors and II-VI compound semiconductors. X Al Y Ga 1-X-YIt is preferable to use nitride semiconductors such as N(0≦X, 0≦Y, X+Y≦1), and InN, AlN, GaN, InGaN, AlGaN, InGaAlN, etc. can also be used. The light-emitting element 14 is, for example, an LED or an LD (Laser Diode). The nitride semiconductor of the light-emitting element 14 is provided on a growth substrate such as sapphire. The light-emitting element 14 may also be obtained by forming a nitride semiconductor on a growth substrate and then removing the growth substrate. The emission peak wavelength of the light-emitting element 14 is preferably 400 nm to 530 nm, more preferably 420 nm to 490 nm, and even more preferably 450 nm to 475 nm, from the viewpoint of luminous efficiency and excitation of the wavelength conversion material described later.

[0046] The wavelength conversion member 13 is, for example, a substantially rectangular member when viewed from above. The wavelength conversion member 13 is provided so as to cover the upper surface of the light-emitting element 14. The wavelength conversion member 13 contains a wavelength conversion material that converts the wavelength of at least a portion of the light from the light-emitting element 14. The wavelength conversion member 13 can be made of a light-transmitting resin material or an inorganic material such as ceramics or glass. As the resin material, thermosetting resins such as silicone resin, silicone-modified resin, epoxy resin, epoxy-modified resin, and phenolic resin can be used. In particular, silicone resin or a modified resin thereof, which has excellent light resistance and heat resistance, is preferred. Here, light transmittance means that it is preferable to transmit 60% or more of the light from the light-emitting element 14. Furthermore, the wavelength conversion member 13 can be made of thermoplastic resins such as polycarbonate resin, acrylic resin, methylpentene resin, and polynorbornene resin. For example, the wavelength conversion member 13 may be a resin material, ceramics, glass, etc. containing a wavelength conversion material, or a sintered body of the wavelength conversion material. Furthermore, the wavelength conversion member 13 may contain a light-diffusing material described later in addition to the resin. Alternatively, the wavelength conversion member 13 may be a multilayer in which a resin layer containing the wavelength conversion material or light-diffusing material is arranged on the ±Z side of a molded body made of resin, ceramics, glass, etc.

[0047] Examples of the wavelength conversion substance included in the wavelength conversion member 13 include yttrium aluminum garnet-based phosphors (e.g., (Y,Gd)3(Al,Ga)5O 12 :Ce), lutetium aluminum garnet-based phosphors (e.g., Lu3(Al,Ga)5O 12 :Ce), terbium aluminum garnet-based phosphors (e.g., Tb3(Al,Ga)5O 12 :Ce), CCA-based phosphors (e.g., Ca 10 (PO4)6Cl2:Eu), SAE-based phosphors (e.g., Sr4Al 14 O 25 :Eu), chlorosilicate-based phosphors (e.g., Ca8MgSi4O 16 Cl2:Eu), silicate-based phosphors (e.g., (Ba,Sr,Ca,Mg)2SiO4:Eu), β-sialon-based phosphors (e.g., (Si,Al)3(O,N)4:Eu) or α-sialon-based phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 :Eu) and other oxynitride-based phosphors, LSN-based phosphors (e.g., (La,Y)3Si6N 11 :Ce), BSESN-based phosphors (e.g., (Ba,Sr)2Si5N8:Eu), SLA-based phosphors (e.g., SrLiAl3N4:Eu), CASN-based phosphors (e.g., CaAlSiN3:Eu) or SCASN-based phosphors (e.g., (Sr,Ca)AlSiN3:Eu) and other nitride-based phosphors, KSF-based phosphors (e.g., K2SiF6:Mn), KSAF-based phosphors (e.g., K2(Si 1-x Al x )F 6-x:Mn where x satisfies 0 < x < 1), or fluoride-based phosphors such as MGF-based 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) can be used. The wavelength conversion material is a particle. 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.

[0048] The light emitting unit 1B includes a light emitting element 14 and a wavelength conversion member 13, and can emit a mixed color light of the color of the light emitted from the light emitting element 14 and the color of the light emitted from the wavelength conversion member 13. In the light emitting unit 1B, the combination of the light emitting element 14 and the wavelength conversion member 13 increases the degree of freedom of the color of the light emitted from the light emitting unit 1B.

[0049] In the present embodiment, the light source 1 uses a blue LED as the light emitting element 14, and the wavelength conversion member 13 includes a wavelength conversion material that wavelength-converts the light emitted from the light emitting element 14 to yellow. Thereby, the light source 1 emits white light. The wavelength or chromaticity of the light emitted from the light source 1 may be appropriately selected according to the use of the light emitting module 100.

[0050] The light-diffusing member 12 is a member that diffuses light from the light-emitting element 14 and the wavelength conversion member 13, and is, for example, a substantially rectangular member when viewed from above. The light-diffusing member 12 can be made of a resin material containing a light-diffusing substance, for example. Examples of light-diffusing substances included in the light-diffusing member 12 include titanium dioxide, barium titanate, aluminum oxide, silicon dioxide, etc., and one of these can be used alone or two or more of these can be used in combination. Furthermore, it is preferable that the resin material be a resin material mainly composed of thermosetting resins such as epoxy resin, epoxy-modified resin, silicone resin, silicone-modified resin, and phenolic resin.

[0051] The second coating member 15 is a member that covers the sides of the first coating member 11, the light diffusion member 12, the wavelength conversion member 13, and the light-emitting element 14. The second coating member 15 directly or indirectly covers the sides of the first coating member 11, the light diffusion member 12, the wavelength conversion member 13, and the light-emitting element 14. Preferably, the second coating member 15 is made of a material with high light reflectivity. By covering the first coating member 11, the light diffusion member 12, the wavelength conversion member 13, and the light-emitting element 14 with the second coating member 15, light leakage from these members is reduced, and light can be efficiently extracted from the light-emitting surface 10. This increases the light extraction efficiency of the light-emitting section 1B. For example, the second coating member 15 can be made of a resin material containing a light-reflective substance such as a white pigment. Alternatively, the second coating member 15 may be a light-reflective member made of an inorganic material containing, for example, boron nitride or alkali metal silicate. In this case, it may further contain titanium oxide or zirconium oxide.

[0052] Examples of light-reflecting substances included in the second coating member 15 include titanium dioxide, 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. It is preferable to use one of these alone or two or more of these in combination. Furthermore, it is preferable to use a resin material mainly composed of thermosetting resins such as epoxy resin, epoxy-modified resin, silicone resin, silicone-modified resin, and phenolic resin as the base material. The second coating member 15 may also be composed of a material that is transparent to or absorbs visible light as needed. A material that absorbs light includes, for example, carbon black.

[0053] The first covering member 11 is a member that covers at least a portion of the upper surface of the light diffusing member 12, and is, for example, a substantially rectangular member when viewed from above. By arranging the first covering member 11, the upper surface of the light diffusing member 12 can be protected from external forces, etc. In this embodiment, the upper surface of the first covering member 11 in Figure 5 is exposed from the second covering member 15 and is the light-emitting surface 10. The first covering member 11 can be made of the same material as the material exemplified for the second covering member 15.

[0054] The base body 18 is a component made primarily of ceramics. Examples of ceramics include aluminum nitride, silicon nitride, aluminum oxide, and silicon carbide. In this embodiment, the light source 1 is mounted on the substrate 4 via the base body 18, thereby improving the heat dissipation of the light-emitting module 100.

[0055] In the light source 1, the thickness of the first coating member 11 is 1 μm or more and 100 μm or less, the thickness of the light diffusing member 12 is 10 μm or more and 200 μm or less, the thickness of the wavelength conversion member 13 is 20 μm or more and 200 μm or less, the thickness of the light-emitting element 14 is 5 μm or more and 50 μm or less, and the thickness of the substrate 18 is 150 μm or more and 1000 μm or less. In addition, the spacing Gp between adjacent light-emitting elements 14 is 5 μm or more and 100 μm or less.

[0056] In this embodiment, the light-emitting element 14 is manufactured by a laser lift-off (LLO) processing method. Here, the LLO processing method is a processing method in which a high-power laser is irradiated onto a workpiece, heating and decomposing the processed surface of the workpiece, thereby separating one or more components into two or more components with the processed surface as the boundary. For example, the manufacturing process of the light-emitting element 14 includes a step of separating the growth substrate of the light-emitting element from the nitride-based semiconductor by the LLO processing method. By manufacturing a light-emitting element 14 from which the growth substrate such as sapphire has been removed by the LLO processing method, the thickness of the light-emitting element 14 is reduced, and the light generated by the nitride-based semiconductor of the light-emitting element 14 and mainly absorbed by the growth substrate can be effectively utilized. In other words, the amount of light absorbed within the light-emitting element 14 is reduced, and the light extraction efficiency is improved. As a result, the light output from the light-emitting element 14 is increased. Note that the light-emitting module 100 may use a light source 1 that does not have a substrate 18. In this case, the LLO processing method may be omitted, and a light-emitting element 14 equipped with a growth substrate may be used. In the light source 1, which does not have a base 18, the electrodes 16 of the light-emitting element 14 and the wiring of the substrate 4 are electrically connected via conductive materials such as bumps and solder.

[0057] (Lens 2) Lens 2 is composed of at least one resin material such as polycarbonate resin, acrylic resin, silicone resin, epoxy resin, or glass material that is light-transmitting to light emitted from light source 1. The first light-transmitting part 20 and the first support part 25 are connected to each other as a single component. However, the first light-transmitting part 20 and the first support part 25 may be separate components. Also, the first support part 25 may be omitted, and the first light-transmitting part 20 may also perform the function of the first support part 25. Note that light-transmitting properties in lens 2 refer to the property of being able to transmit 60% or more of the light from light source 1.

[0058] In the example shown in Figure 1, the first translucent portion 20 is approximately circular in top view. However, the first translucent portion 20 is not limited to being approximately circular in top view, but may be approximately rectangular, approximately elliptical, or approximately polygonal, etc. Also, the first translucent portion 20 may be rotationally symmetric in top view. Considering that the imaging range of a typical imaging device is approximately rectangular, it is preferable that the first translucent portion 20 is four-fold or two-fold rotationally symmetric in top view.

[0059] In the example shown in Figure 2, the annular convex surface 211 on the light incident surface 21 is a convex surface that is convex toward the side where the light source 1 is located. The annular convex surface 221 on the light emission surface 22 is a convex surface that is convex toward the side opposite to where the light source 1 is located. The first light-transmitting section 20 is a biconvex single lens with a through hole 23 in the center. The annular convex surfaces 211 and 221 are both spherical. However, at least one of the light incident surface 21 and 22 of the first light-transmitting section 20 may be concave. The first light-transmitting section 20 may be a meniscus single lens with a through hole 23 in the center. The annular convex surfaces 211 and 221 are not limited to spherical surfaces, but may be aspherical.

[0060] The through-hole 23 shown in Figure 1 is approximately circular in top view. Also, as shown in Figure 2, in a cross-section parallel to the Z-axis passing through the central axis 20C, the through-hole 23 is a hole whose inner surface 23a is aligned with the central axis 20C of the first light-transmitting section 20. The through-hole 23 is a tapered hole whose inner surface tapers in the direction opposite to the direction in which the light source 1 is located (in other words, the direction in which light is emitted from the light-emitting module 100). The area of ​​the first opening 231 of the through-hole 23 is larger than the area of ​​the second opening 232. This makes it possible to narrow the light distribution of the light passing through the through-hole 23. However, the through-hole 23 may be a tapered hole whose inner surface tapers in the direction in which the light source 1 is located, or it may be a hole parallel to the central axis 20C of the first light-transmitting section 20.

[0061] In the example shown in Figure 1, the first support portion 25 is a cylindrical portion that supports the first translucent portion 20 from the outside when viewed from above. Furthermore, the first support portion 25 is a continuous circular ring when viewed from above. However, the first support portion 25 is not limited to a circular ring when viewed from above, but may be a rectangular ring or a polygonal ring. In addition, the first support portion 25 may consist of multiple first support portions 25, and the multiple first support portions 25 may be arranged in a ring when viewed from above.

[0062] (Circuit board 4) The substrate 4 is a substrate equipped with wiring on which the light source 1 can be mounted. In the examples shown in Figures 1 and 2, the substrate 4 is a plate-shaped member that is approximately circular when viewed from above. The substrate 4 may be approximately rectangular, approximately elliptical, or approximately polygonal when viewed from above. In addition, other electronic components besides the light source 1 may be placed on the substrate 4. These electronic components may be Zener diodes, thermistors, capacitors, light receiving sensors, etc.

[0063] The substrate 4 preferably uses an insulating material as its base material, and it is preferable to use a material that does not easily transmit light emitted from the light source 1 or light incident on the inside of the light-emitting module 100 from the outside. Furthermore, it is preferable to use a material that has a certain strength for the substrate 4. Specifically, the substrate 4 can be constructed using ceramics such as alumina, aluminum nitride, mullite, and silicon nitride, or resins such as phenolic resin, epoxy resin, polyimide resin, BT resin (bismaleimide triazine resin), polyphthalamide, and polyester resin as its base material.

[0064] The wiring on substrate 4 can be made of at least one of the following materials: copper, iron, nickel, tungsten, chromium, aluminum, silver, gold, titanium, palladium, rhodium, or alloys thereof. In addition, the surface layer of the wiring on substrate 4 may be provided with a layer of silver, platinum, aluminum, rhodium, gold, or alloys thereof, from the viewpoint of wettability and light reflectivity, among other things.

[0065] [Modified version of the first embodiment] A modified light-emitting module 100a, which is a modification of the first embodiment, will now be described. Figure 6 is a schematic top view of the light-emitting module according to a modification of the first embodiment. Figure 7 is a schematic cross-sectional view taken along the line VII-VII in Figure 6. The light-emitting module 100a mainly differs from the light-emitting module 100 in that it further includes a light-transmitting member 3.

[0066] Figures 6 and 7 show a modified light-emitting module 100a of the first embodiment. In the example shown in Figure 6, the outer shape of the light-emitting module 100a is approximately circular when viewed from above. In a top view, the outer shape of the light-transmitting member 3 is the same as the outer shape of the light-emitting module 100a. However, the outer shapes of the light-emitting module 100a and the light-transmitting member 3 are not limited to approximately circular when viewed from above, and may be other shapes such as approximately elliptical, approximately rectangular, or approximately polygonal. In the example shown in Figures 6 and 7, the light-emitting module 100a further includes a substrate 4 and an adhesive member 5a disposed between the first support portion 25 and the inner surface 320 of the light-transmitting member 3.

[0067] In the light-emitting module 100a, the light-transmitting member 3 includes a second light-transmitting portion 31 and a second support portion 32 that supports the second light-transmitting portion 31. The second light-transmitting portion 31 faces the light-emitting surface of the lens 2. The first support portion 25 is fixed to the second support portion 32. Because the light-emitting module 100a has a light-transmitting member 3, light distribution can be controlled using the first light-transmitting portion 20 of the lens 2 and the second light-transmitting portion 31 of the light-transmitting member 3, thus increasing the degree of freedom in light distribution control. In addition, the fixing of the first support portion 25 to the second support portion 32 ensures stable fixing of the first support portion 25.

[0068] (Translucent member 3) The light-transmitting member 3 is positioned to cover the lens 2. The second light-transmitting portion 31 transmits light that has been emitted from the light source 1 and passed through the lens 2. The light-transmitting member 3 is composed of at least one resin material such as polycarbonate resin, acrylic resin, silicone resin, epoxy resin, or glass material that is light-transmitting to light emitted from the light source 1. Preferably, the light-transmitting property of the second light-transmitting portion 31 is such that it can transmit 60% or more of the light from the light source 1.

[0069] In the example shown in Figure 7, the second translucent portion 31 and the second support portion 32 are a single integrated component without the use of adhesive. From another perspective, the second translucent portion 31 is connected to the second support portion 32. However, the second translucent portion 31 and the second support portion 32 may be separate components joined together by adhesive.

[0070] In the examples shown in Figures 6 and 7, the second light-transmitting portion 31 of the light-transmitting member 3 has a light-incident surface 310 facing the light-emitting surface 22 of the lens 2. The light-incident surface 310 is provided with a plurality of concentric protrusions 311 centered on the central axis 31C of the second light-transmitting portion 31. In a top view, the central axis 31C of the second light-transmitting portion 31 coincides with the central axis 20C of the first light-transmitting portion 20 and the center 1AC of the light-emitting region 1A of the light source 1. The protrusions 311 may be Fresnel lenses having a Fresnel shape. However, the protrusions 311 are not limited to Fresnel lenses and may have other shapes such as a biconvex single lens, a plano-convex single lens, a biconcave single lens, a plano-concave single lens, an array lens, a meniscus single lens, an aspherical lens, a cylindrical lens, etc.

[0071] The second support portion 32 supports the second light-transmitting portion 31 so that it is positioned above the first light-transmitting portion 20. The second support portion 32 is a circular, annular portion of the light-transmitting member 3 when viewed from above. The second support portion 32 is a cylindrical portion that extends downward on the outside of the substrate 4 and the outside of the lens 2. The second support portion 32 is positioned so that a part of its inner surface 320 faces the outer surface 26 of the first support portion 25 of the lens 2, and the part of the inner surface 320 and the outer surface 26 of the first support portion 25 are joined by an adhesive member 5a. The light-transmitting member 3 and the lens 2 are joined by the joining of the second support portion 32 and the first support portion 25. Note that the adhesive member 5a does not need to be placed between the first support portion 25 and the second support portion 32, as long as it fixes at least the substrate 4 and the light-transmitting member 3.

[0072] [Second Embodiment] Next, a light-emitting module 200 having a lens 2a according to the second embodiment will be described. Note that names and reference numerals identical to those used in the previously described embodiments indicate the same or identical components or configurations, and detailed explanations will be omitted as appropriate. This also applies to the embodiments and examples described hereafter.

[0073] Figure 8 is a schematic top view of a light-emitting module 200 having a lens 2a according to the second embodiment. Figure 9 is a schematic cross-sectional view along the line IX-IX in Figure 8, showing the behavior of light L1 and light L2 emitted from the lens 2a according to the second embodiment. In Figure 9, some of the light rays (first ray L11) emitted from the first light-emitting unit 1-1 are represented by solid arrows. Also, some of the light rays (second ray L21) emitted from the second light-emitting unit 1-2 are represented by dashed arrows.

[0074] The light-emitting module 200 having the lens 2a according to the second embodiment includes a light source 1 and the lens 2a. In this embodiment, the light-emitting surface 22 of the first light-transmitting portion 20 of the lens 2a includes at least one annular protrusion 27 centered on the central axis 20C of the first light-transmitting portion 20. The at least one annular protrusion 27 includes an annular first protrusion 27-1 capable of guiding light to a first light distribution angle, and an annular second protrusion 27-2 that, in a top view, surrounds the annular first protrusion 27-1 and is capable of guiding light to a second light distribution angle greater than the first light distribution angle. The lens 2a according to this embodiment differs from the lens 2 according to the first embodiment in the above respects.

[0075] In the examples shown in Figures 8 and 9, the light-emitting surface 22 of the first light-transmitting section 20 includes four concentric annular protrusions 27 centered on the central axis 20C of the first light-transmitting section 20. The first annular protrusion 27-1 capable of guiding light to the first beam angle is the second annular protrusion 27 located from the innermost to the outermost part. The second annular protrusion 27-2 capable of guiding light to the second beam angle is the third annular protrusion 27 located from the innermost to the outermost part. In the example shown in Figure 9, the first annular protrusion 27-1 guides a portion of the light L1 emitted from the first light-emitting section 1-1 to the first beam angle by reflecting it with its inner surface 27-1a. The second annular protrusion 27-2 guides a portion of the light L2 emitted from the second light-emitting section 1-2 to the second beam angle by reflecting it with its inner surface 27-2a. The second beam angle is larger than the first beam angle.

[0076] Light emitted from the first light-emitting part 1-1 and refracted or reflected by the first protrusion 27-1 includes the first ray L11. Light emitted from the second light-emitting part 1-2 and refracted or reflected by the second protrusion 27-2 includes the second ray L21. The angle φ4 between the second ray L21 and the central axis 20C of the first light-transmitting part 20 is greater than the angle φ3 between the first ray L11 and the central axis 20C of the first light-transmitting part 20. In the example shown in Figure 9, the first ray L11 is light reflected from the inner surface 27-1a of the first protrusion 27-1. The second ray L21 is light reflected from the inner surface 27-2a of the second protrusion 27-2.

[0077] The light incident surface 21 of the first light-transmitting section 20 has an annular convex surface 211 surrounding the through-hole 23 when viewed from above. The through-hole 23 includes a first opening 231 located on the light incident surface 21 side and a second opening 232 located on the light emission surface 22 side, and is a tapered hole in which the area of ​​the first opening 231 is smaller than the area of ​​the second opening 232. In other words, the through-hole 23 is a tapered hole in which its inner surface 23a tapers in the direction in which the light source 1 is located. This makes it possible, for example, to control the light distribution according to the inclination angle of the inner surface 23a with respect to the central axis 20C of the first light-transmitting section 20. The through-hole 23 may also be a tapered hole in which its inner surface 23a tapers in the direction opposite to the direction in which the light source 1 is located, or it may be a parallel hole.

[0078] In this embodiment, the annular convex surface 211 includes a gently curved surface that is convex toward the light source 1. This allows the outward-facing light emitted from the light source 1 to be refracted toward the central axis 20C of the first light-transmitting portion 20 by the annular convex surface 211, thereby increasing the amount of light refracted or reflected by the first convex portion 27-1 and the second convex portion 27-2. The annular convex surface 211 may also include a flat surface, as long as it is convex toward the light source 1.

[0079] In this embodiment, the lens 2a has a through hole 23 formed in the first light-transmitting portion 20, and the first light-transmitting portion 20 has a first convex portion 27-1 and a second convex portion 27-2 on the light-emitting surface 22. This makes it possible to make the light distribution different for light passing through the through hole 23 and light passing through the portion other than the through hole 23. The through hole 23 guides a portion of the light L1 emitted from the first light-emitting portion 1-1 to the third light distribution angle by reflecting it with its inner surface 23a. Therefore, the first light distribution angle is larger than the third light distribution angle, and the second light distribution angle is larger than the first light distribution angle. In this embodiment, by making the light distribution different for light passing through the through hole 23 and light passing through the portion other than the through hole 23, it is possible to provide a lens 2a that allows for light distribution control. By increasing the distance between the light source 1 and the lens 2a, it becomes easier to control the light passing through the through hole 23, and a narrow-angle light distribution can be achieved. Furthermore, in this embodiment, it is possible to provide a light-emitting module 200 having the lens 2a and capable of light distribution control.

[0080] The number of annular protrusions 27 on the light-emitting surface 22 is not limited to four, but may be any number. The positions of the annular first protrusion 27-1 and the annular second protrusion 27-2 can be determined as appropriate, as long as the annular second protrusion 27-2 surrounds the annular first protrusion 27-1. The annular first protrusion 27-1 may reflect or refract light L1 with its outer surface. The annular second protrusion 27-2 may reflect or refract light L2 with its outer surface.

[0081] In this embodiment, the first light-transmitting portion 20 and the first support portion 25 are connected to each other as a single integrated member. However, the first light-transmitting portion 20 and the first support portion 25 may be separate members. Alternatively, the first support portion 25 may be omitted, and the first light-transmitting portion 20 may also perform the function of the first support portion 25.

[0082] Furthermore, the light-emitting module 200 may further include a light-transmitting member 3 positioned to cover the lens 2a. The light-transmitting member 3 shown in Figures 6 and 7 can be used.

[0083] [Third Embodiment] Next, a light-emitting module 300 having a lens 2b according to the third embodiment will be described with reference to Figures 10 and 11. Figure 10 is a schematic top view of the light-emitting module 300 having a lens 2b according to the third embodiment. Figure 11 is a schematic cross-sectional view along the line XI-XI in Figure 10, showing the behavior of light L1 and light L2 emitted from the lens 2b. In Figure 11, some of the light rays of light L1 emitted from the first light-emitting unit 1-1 are represented by solid arrows. Also, some of the light rays of light L2 emitted from the second light-emitting unit 1-2 are represented by dashed arrows.

[0084] In this embodiment, the first light-transmitting portion 20 of the lens 2b has a main body portion 60 having a first main surface 28 including the light incident surface 21 and a second main surface 29 located on the opposite side of the first main surface 28, and an annular protrusion 61 disposed on the second main surface 29 of the main body portion 60. The protrusion 61 is annular in shape with respect to the central axis 20C of the first light-transmitting portion 20. The annular protrusion 61 has an inner surface 61a located on the through-hole 23 side and an outer surface 61b located outside the inner surface 61a. The first light-transmitting portion 20, on the light-emitting surface 22, is composed of the inner surface 61a of the annular protrusion 61 and the second main surface 29 of the main body portion 60, and includes an annular first concave surface 62 surrounding the through-hole 23. The lens 2b according to this embodiment differs from the lens 2 according to the first embodiment in the above respects.

[0085] An air layer 63 exists between the outer surface 61b of the annular protrusion 61 and the second main surface 29 of the main body 60. The air layer 63 can also be described as space. In the example shown in Figure 11, the protrusion 61 includes a flat upper surface 61u. The upper surface 61u is annular in shape centered on the central axis 20C of the first translucent portion 20. The inner surface 61a of the protrusion 61 is included in the second main surface 29. A part of the annular first concave surface 62 constitutes the inner surface 61a of the protrusion 61.

[0086] The light L1 emitted from the first light-emitting section 1-1 includes light L13 irradiated through the through-hole 23 and light L14 refracted or reflected by the outer surface 61b of the annular protrusion 61. In the example shown in Figure 11, the through-hole 23 is a hole whose inner surface 23a is parallel to the central axis 20C of the first light-transmitting section 20. By having the inner surface 23a of the through-hole 23 parallel to the central axis 20C, it is possible to reduce excessive spreading of the light distribution of light passing through the through-hole 23 and a decrease in the illuminance of light passing through the through-hole 23. In the example shown in Figure 11, light L13 travels along the central axis 23C of the through-hole 23. Light L14 is incident on the inner surface 23a of the through-hole 23, passes through the inside of the main body 60 and the inside of the protrusion 61, is reflected by the outer surface 61b of the protrusion 61, and exits from the upper surface 61u of the protrusion 61. The through-hole 23 may be a tapered hole whose inner surface tapers in the direction opposite to the direction in which the light source 1 is located, or it may be a tapered hole that tapers in the direction in which the light source 1 is located. This allows for adjustment of the light distribution of the light passing through the through-hole 23.

[0087] The light incident surface 21 of the first light-transmitting portion 20 has an annular second concave surface 64 at a position that overlaps with the second light-emitting portion 1-2 when viewed from above. In the example shown in Figure 11, the annular second concave surface 64 includes the portion of the light incident surface 21 that surrounds the through hole 23 and faces the second light-emitting portion 1-2.

[0088] In the example shown in Figure 11, the light L2 emitted from the second light-emitting section 1-2 is incident on the second concave surface 64 of the first main surface 28 and is refracted in a direction away from the central axis 20C of the first light-transmitting section 20. The light L2 then passes through the interior of the main body section 60 and exits from the inner surface 61a of the first concave surface 62 and the convex portion 61. At least a portion of the light L2 emitted from the second light-emitting section 1-2 is diffused by the concave surface included in the inner surface 61a of the annular first concave surface 62 and the convex portion 61, and is refracted in a direction away from the central axis 20C of the first light-transmitting section 20. As a result, in this embodiment, it is possible to emit light with a wide beam angle.

[0089] Furthermore, at least a portion of the light L2 emitted from the second light-emitting section 1-2 is diffused by the annular first concave surface 62. In the example shown in Figure 11, the light L2 emitted from the second light-emitting section 1-2 is incident on the first main surface 28, passes through the interior of the main body 60, and then exits from the first concave surface 62. The light L2 is diffused when it exits from the first concave surface 62. In Figure 11, the diffused light L2s emitted from the second light-emitting section 1-2 that is diffused by the annular first concave surface 62 is indicated by a dashed arrow. The degree of diffusion at the first concave surface 62 can be adjusted by the surface roughness of the first concave surface 62, etc.

[0090] Thus, in this embodiment, at least a portion of the light L2 emitted from the second light-emitting unit 1-2 is diffused by the annular first concave surface 62. This makes it possible to increase the beam angle of the light L2 from the second light-emitting unit 1-2.

[0091] In this embodiment, there is an air layer 63 between the outer surface 61b of the annular protrusion 61 and the second main surface 29 of the main body 60. This allows light L1 that passes through the inside of the annular protrusion 61 and enters the outer surface 61b to be reflected by the outer surface 61b and propagated toward the central axis 20C of the first light-transmitting portion 20. By irradiating with narrow-angle mode light through the annular protrusion 61, this embodiment makes it possible to irradiate with light with a narrower beam angle compared to when the light is irradiated without passing through the annular protrusion 61.

[0092] In this embodiment, the light L1 emitted from the first light-emitting unit 1-1 includes light L13 irradiated through the through hole 23 and light L14 refracted or reflected by the outer surface 61b of the annular protrusion 61. By utilizing not only light L13 but also light L14, the light extraction efficiency is improved.

[0093] In this embodiment, a through hole 23 is formed in the first light-transmitting portion 20, and the first light-transmitting portion 20 includes an annular first concave surface 62 surrounding the through hole 23 on the light-emitting surface 22. This makes it possible to make the light distribution different for light passing through the through hole 23 and light passing through the other portions. In this embodiment, by making the light distribution different for light passing through the through hole 23 and light passing through the other portions, a lens 2b capable of light distribution control can be provided. Furthermore, in this embodiment, a light-emitting module having the lens 2b and capable of light distribution control can be provided.

[0094] As described above, if the light incident surface 21 of the first light-transmitting section 20 has an annular second concave surface 64 at a position that overlaps with the second light-emitting section 1-2 when viewed from above, the amount of light from the light source 1 that is totally reflected at the light incident surface 21 and does not enter the first light-transmitting section 20 can be reduced. In other words, compared to a configuration in which the light incident surface 21 of the first light-transmitting section 20 has an annular second concave surface 64 at a position that overlaps with the second light-emitting section 1-2 when viewed from above, the amount of light taken into the first light-transmitting section 20 increases, the light extraction efficiency is increased, and the light incident on the first light-transmitting section 20 spreads more easily. Note that the light incident surface 21 of the first light-transmitting section 20 may also be a flat surface parallel to the light-emitting section 10 of the light source 1.

[0095] The light-emitting module 300 having a lens 2b according to the third embodiment may further include a light-transmitting member 3 arranged to cover the lens 2b. The light-transmitting member 3 shown in Figures 6 and 7 can be applied.

[0096] [Examples and Reference Examples] Examples and reference examples are described below. However, this disclosure is not limited in any way by these examples.

[0097] In the examples and reference examples, the following items (1) to (4) were evaluated for the light-emitting modules related to Example 1, Example 2, Example 3, Reference Example 1, and Reference Example 2, respectively. FOV stands for Field Of View. (1) Central illuminance (lux) on the illuminated surface 1m away from the light-emitting surface of the light-emitting module. (2) FOV 0° (3) FOV 45° (4) FOV 90°

[0098] For item (1) above, the central illuminance (lux) of narrow-angle, wide-angle, and ultra-wide-angle light distribution was evaluated. In the light-emitting modules for each of Examples 1, 2, 3, Reference Example 1, and Reference Example 2, the narrow-angle mode for emitting narrow-angle light distribution was specified as either a mode (A) in which some of the 24 second light-emitting units 1-2 and the first light-emitting unit 1-1 are illuminated, or a mode (B) in which only the first light-emitting unit 1-1 is illuminated and the second light-emitting units 1-2 are not illuminated. Furthermore, in the light-emitting modules for each of Examples 1, 2, 3, Reference Example 1, and Reference Example 2, the wide-angle mode for emitting wide-angle or ultra-wide-angle light distribution was specified as one of the following modes: (a) a mode in which only some of the 24 second light-emitting units 1-2 emit light; (b) a mode in which all 24 second light-emitting units 1-2 emit light; or (c) a mode in which all 24 second light-emitting units 1-2 and the first light-emitting unit 1-1 emit light. The specifications of the light-emitting modules for each of Examples 1, 2, 3, Reference Example 1, and Reference Example 2 are shown in Table 1. In Example 2, the current values ​​applied to the 24 second light-emitting units 1-2 were different for wide-angle and ultra-wide-angle light distribution.

[0099] [Table 1]

[0100] Items (2) through (4) above are evaluations of the field of view angle θ (hereinafter also referred to as the irradiation angle θ) of the narrow-angle light distribution irradiation in the irradiation area SP when the light-emitting modules for each of the examples 1, 2, 3, 1, and 2 are used as light sources for a flashlight. For each of the light-emitting modules, the narrow-angle mode for irradiating with a narrow-angle light distribution is specified as mode (B), in which only the first light-emitting unit 1-1 is illuminated and the second light-emitting unit 1-2 is not illuminated.

[0101] Here, we will explain the evaluation methods for items (2) to (4) with reference to Figure 12. Figure 12 is a diagram illustrating the irradiation angle θ of the light emitted by the light source PL. In Figure 12, the irradiation area SP on the irradiation surface of the light emitted by the light source PL is shown. The irradiation area SP is shown as a rectangular area.

[0102] The irradiation angle θ is the angle at which the illuminance in the irradiation area SP (in other words, on the XY plane or irradiation surface of the irradiation area SP) is 10% relative to the maximum illuminance of 100% in the irradiation area SP. For example, as shown in Figure 12, when light is shone onto the irradiation area SP from a light source PL located at a distance h in the vertical direction (Z-axis direction) from the center position O of the irradiation area SP, the maximum illuminance is obtained at the center position O of the irradiation area. When the illuminance at the center position O is set to 100%, the position at which the illuminance in the irradiation area SP is 10% is defined as the outer edge position t. In this embodiment, items (2) to (4) are calculated and evaluated based on the positional relationship between the two outer edge positions t and the light source PL, and a smaller irradiation angle θ is preferred.

[0103] For item (2), FOV 0°, in the illumination area SP, the position where the illuminance is 10% in the direction parallel to the X-axis (0° direction) passing through the center position O is defined as outer edge position t1, and the distance T between the two outer edge positions t1 is defined as T1. For item (3), FOV 45°, in the illumination area SP, the position where the illuminance is 10% in the direction inclined at 45° with respect to the X-axis (45° direction) passing through the center position O is defined as outer edge position t2, and the distance T between the two outer edge positions t2 is defined as T2. For item (4), FOV 90°, in the illumination area SP, the position where the illuminance is 10% in the direction perpendicular to the X-axis (90° direction or direction parallel to the Y-axis) passing through the center position O is defined as outer edge position t3, and the distance T between the two outer edge positions t3 is defined as T3. For items (2) through (4), as an example, the distance h = 150 mm was used, and the distances T (T1, T2, and T3) were substituted into the following equation (1) to calculate the illumination angle θ of the narrow-angle beam. Figure 12 illustrates the calculation of the illumination angle θ for an FOV of 45° in item (3) as an example.

[0104]

number

[0105] <Evaluation Results> Table 2 shows the evaluation results of the light-emitting modules for each of the following: Example 1, Example 2, Example 3, Reference Example 1, and Reference Example 2. The meanings of "◎", "〇", and "△" in Table 2 are as follows. Furthermore, the target value for item (1) means the illuminance that can provide sufficient light to the illuminated area in wide-angle mode or narrow-angle mode. The target values ​​for items (2) to (4) mean that when the light-emitting module is used as a light source for a flashlight, the irradiation angle θ of the emitted light is a sufficiently small value. "◎": Fully satisfies the target value. "〇": Meets the target value. "△": The target value is not met.

[0106] [Table 2]

[0107] (Example 1) Example 1 evaluated the optical properties of a light-emitting module 100a according to a modification of the first embodiment. The materials of the lens 2 and light-transmitting member 3 of the light-emitting module 100a were polycarbonate resin. In Example 1, the illuminance for narrow-angle and ultra-wide-angle light distribution was "◎". The illuminance for wide-angle light distribution was "〇". FOV 0°, FOV 45°, and FOV 90° were all "◎". Therefore, in Example 1, all items satisfied the target values.

[0108] (Example 2) Example 2 is a light-emitting module that further includes a light-transmitting member 3 positioned to cover the lens 2a, in addition to the light-emitting module 200 according to the second embodiment. The materials of the lens 2a and the light-transmitting member 3 are the same as in Example 1, and the light-transmitting member 3 has the same configuration as in Example 1. In Example 2, the illuminance for narrow-angle and ultra-wide-angle light distribution was "◎", and the illuminance for wide-angle light distribution was "〇". FOV 0°, FOV 45°, and FOV 90° were all "〇". Therefore, in Example 2, all items satisfied the target values.

[0109] (Example 3) Example 3 evaluated the optical properties of a light-emitting module that further includes a light-transmitting member 3 positioned to cover the lens 2b, in addition to the light-emitting module 300 according to the third embodiment. The materials of the lens 2b and the light-transmitting member 3 were the same as in Example 1, and the light-transmitting member 3 had the same configuration as in Example 1. In Example 3, the illuminance for narrow-angle, wide-angle, and ultra-wide-angle light distribution was "◎". FOV 0°, FOV 45°, and FOV 90° were all "〇". Therefore, in Example 3, all items satisfied the target values. Furthermore, from the results for central illuminance, it was found that the light extraction efficiency is improved compared to other examples because the first light-transmitting part 20 has an annular protrusion 61, allowing the use of light refracted or reflected by the protrusion 61.

[0110] (Reference example 1) Reference Example 1 evaluated the optical characteristics of a light-emitting module that differs from a modified light-emitting module 100a of the first embodiment mainly in that the first light-transmitting portion 20 does not have a through hole 23 and does not have an annular protrusion 24. In Reference Example 1, the illuminance for narrow-angle distribution was "◎", the illuminance for wide-angle distribution and ultra-wide-angle distribution was "〇". FOV 0° and FOV 45° were "〇", and FOV 90° was "△". Therefore, in Reference Example 1, FOV 90° did not satisfy the target value.

[0111] (Reference example 2) Reference Example 2 is a light-emitting module that differs from the light-emitting module 100a of the first embodiment mainly in that the first light-transmitting section 20 does not have a through hole 23. In Reference Example 2, the illuminance for narrow-angle light distribution was "◎", while the illuminance for wide-angle light distribution and ultra-wide-angle light distribution was "△". FOV 0°, FOV 45°, and FOV 90° were all "◎". Therefore, in Reference Example 2, FOV 0°, FOV 45°, and FOV 90° were superior, but the illuminance for narrow-angle light distribution and ultra-wide-angle light distribution did not satisfy the target values.

[0112] The results in Table 2 show that Examples 1, 2, and 3 are superior to Reference Examples 1 and 2. Furthermore, Example 1 is slightly superior to Examples 2 and 3.

[0113] Although preferred embodiments have been described in detail above, the invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims.

[0114] The ordinal numbers, quantities, and other figures used in the description of the embodiments are all illustrative to specifically illustrate the technology of this disclosure, and this disclosure is not limited to the illustrative figures. Furthermore, the connection relationships between the components are illustrative to specifically illustrate the technology of this disclosure, and are not limited to the connection relationships that realize the functions of this disclosure.

[0115] The lenses and light-emitting modules of this disclosure are suitable for use in lighting, camera flashes, automotive headlights, and the like, as they allow for light distribution control. However, the lenses and light-emitting modules of this disclosure are not limited to these applications.

[0116] The aspects of this disclosure are, for example, as follows: <Item 1> A lens having a first light-transmitting portion comprising a light-incident surface and a light-emitting surface located opposite to the light-incident surface, wherein the first light-transmitting portion is provided with a through hole continuous with the light-incident surface and the light-emitting surface, and at least one of the light-incident surface and the light-emitting surface includes at least one annular protrusion arranged to surround the through hole in a top view. <Item 2> The lens according to <Item 1>, wherein the light incident surface and the light exit surface each include an annular convex surface surrounding the through hole in a top view, and the annular convex portion is positioned on the light incident surface and surrounds the annular convex surface in a top view, and includes an inner surface and an outer surface, at least one of which is capable of refracting or reflecting light. <Item 3> The lens described in <Item 2> includes a first aperture located on the light incident surface side and a second aperture located on the light emission surface side, wherein the first aperture is located between the annular protrusion and the second aperture in a direction along the central axis of the through hole passing through the center of the first aperture and the center of the second aperture. <Clause 4> The light emitting surface includes the at least one annular protrusion, the at least one annular protrusion comprising an annular first protrusion capable of guiding light to a first optical angle, and an annular second protrusion that, in a top view, surrounds the annular first protrusion and is capable of guiding light to a second optical angle greater than the first optical angle, the lens according to <Clause 1>. <Item 5> The lens according to any one of <Item 1> to <Item 4>, wherein the through hole includes a first aperture located on the light incident surface side and a second aperture located on the light emission surface side, and the area of ​​the first aperture is smaller than the area of ​​the second aperture. <Item 6> The first light-transmitting portion is the lens described in <Item 1>, comprising a main body having a first main surface including the light incident surface and a second main surface located on the opposite side of the first main surface, and an annular protrusion disposed on the second main surface of the main body, the annular protrusion having an inner surface located on the through-hole side and an outer surface located outside the inner surface, and the first light-transmitting portion, on the light-emitting surface, is composed of the inner surface of the annular protrusion and the second main surface of the main body, and includes an annular first concave surface surrounding the through-hole. <Item 7> The lens according to <Item 6>, wherein there is an air layer between the outer surface of the annular protrusion and the second main surface of the main body. <Clause 8> A light-emitting module comprising, in a top view, a first light-emitting portion located in a central region and a second light-emitting portion located in an outer peripheral region arranged on the outer periphery of the central region, wherein the first light-emitting portion and the second light-emitting portion are individually drivable, and a lens according to any one of <Clause 1> to <Clause 6> arranged above the light-emitting portion, wherein, in a top view, the first light-emitting portion is arranged to overlap the through-hole, light emitted from the first light-emitting portion is irradiated through the through-hole at a first half-value full angle, and light emitted from the second light-emitting portion is irradiated through the annular protrusion at a second half-value full angle, and the first half-value full angle is smaller than the second half-value full angle. <Clause 9> The light emitted from the second light-emitting section, the light irradiated through the annular protrusion, travels in a direction toward the central axis of the first light-transmitting section and irradiates the irradiation surface, as described in <Clause 8>. <Clause 10> The second light-emitting unit is a light-emitting module according to <Clause 8> or <Clause 9>, which includes a plurality of individually drivable light-emitting units. <Item 11> In a top view, the light incident surface and the light emission surface each include an annular convex surface surrounding the through hole, the annular convex portion surrounds the annular convex surface and is positioned on the light incident surface, and the light source includes a rectangular light-emitting region, with the annular convex portion and the corners of the light-emitting region overlapping, the light-emitting module is as described in any one of <Item 8> to <Item 10>. <Clause 12> The light-emitting module according to any one of <Clause 8> to <Clause 11>, wherein the lens has a first support portion that supports the first light-transmitting portion, and further comprises a light-transmitting member including a second light-transmitting portion facing the light-emitting surface of the lens and a second support portion that supports the second light-transmitting portion, the first support portion being fixed to the second support portion. <Clause 13> The lens is the lens described in <Clause 4>, wherein the light emitted from the first light-emitting portion and refracted or reflected by the first convex portion includes a first ray, the light emitted from the second light-emitting portion and refracted or reflected by the second convex portion includes a second ray, and the angle between the second ray and the central axis of the first light-transmitting portion is greater than the angle between the first ray and the central axis of the first light-transmitting portion, as described in <Clause 8>. <Clause 14> The lens is the lens described in <Clause 6>, and the light emitted from the first light-emitting part is the light-emitting module described in <Clause 8>, comprising light irradiated through the through hole and light refracted or reflected by the outer surface of the annular protrusion. <Clause 15> The lens is the lens described in <Clause 6>, and at least a portion of the light emitted from the second light-emitting part is diffused by the annular first concave surface, the light-emitting module described in <Clause 8> or <Clause 14>. <Item 16> The lens is the lens described in <Item 6>, and the light incident surface of the first light-transmitting portion has an annular second concave surface at a position that overlaps with the second light-emitting portion when viewed from above, as described in <Item 8>, the <14> The light-emitting module is one of the items described in item 15 above. [Explanation of symbols]

[0117] 1 light source 1-1 First light-emitting section 1-2 Second light-emitting section 1A Emitting Region 1AC center 1B Light-emitting part 1K Corner 2, 2a, 2b lenses 3 Translucent material 4 circuit boards 5, 5a Adhesive material 10 Light-emitting surface 11 First covering member 12 Light Diffusing Member 13 Wavelength conversion component 14 Light-emitting elements 15. Second covering member 16 electrodes 17. First wiring component 18 Base 19. Second wiring component 20 1st transparent part 20C center axis 21 Light entrance surface 22 Light exit surface 23 Through hole 23a Inside surface 23C center axis 24 Convex part 24a Inside surface 24b External surface 24t top 25 1st support part 26 External surface 27 Convex part 27-1 First protrusion 27-1a Inside surface 27-2 Second protrusion 27-2a Inside surface 28. First Main Surface 29 Second Main Surface 31 2nd transparent part 31C center axis 32 Second support part 41 Top side 60 Main body 61 Convex part 61a Inside surface 61b External surface 61u top 62 1st concave surface 63 Air layer 64 2nd concave surface 100, 100a, 200, 300 light-emitting modules 150 Resin components 211 Ring-shaped convex surface 221 Ring-shaped convex surface 231 First opening 231C center 232 Second opening 232C center 310 Light incidence surface 311 Convex part 320 Inner surface Gp interval h distance L1, L2, L13, L14 light L11 1st ray L21 Second ray L2s diffused light O center position PL light source S Irradiation surface SP irradiation area T, T1, T2, T3 distance t, t1, t2, t3 Outer edge positions θ viewing angle, illumination angle θ1 First half-maximum full-angle θ2 Second half-maximum full-angle φ1, φ2, φ3, φ4 square

Claims

1. It has a first light-transmitting portion comprising a light-incident surface and a light-emitting surface located on the opposite side of the light-incident surface, The first light-transmitting portion is provided with a through hole that is continuous with the light incident surface and the light emission surface. A lens in which at least one of the light incident surface and the light exit surface includes at least one annular protrusion arranged to surround the through hole when viewed from above.

2. The light incident surface and the light emission surface each include an annular convex surface surrounding the through hole when viewed from above. The lens according to claim 1, wherein the annular protrusion is positioned on the light incident surface and, in a top view, surrounds the annular protrusion, and at least one of the inner and outer surfaces is capable of refracting or reflecting light.

3. The through hole includes a first opening located on the light incident surface side and a second opening located on the light emission surface side. The lens according to claim 2, wherein the first opening is located between the annular protrusion and the second opening in a direction along the central axis of the through hole passing through the center of the first opening and the center of the second opening.

4. The light-emitting surface includes the at least one annular protrusion, The at least one annular protrusion is, An annular first protrusion capable of guiding light to a first beam angle, The lens according to claim 1, comprising, in a top view, an annular second protrusion that surrounds the annular first protrusion and is capable of guiding light to a second light distribution angle that is larger than the first light distribution angle.

5. The lens according to claim 1, wherein the through hole includes a first aperture located on the light incident surface side and a second aperture located on the light emission surface side, and the area of ​​the first aperture is smaller than the area of ​​the second aperture.

6. The first light-transmitting portion has a main body having a first main surface including the light incident surface and a second main surface located on the opposite side of the first main surface, and the annular protrusion disposed on the second main surface of the main body, The annular protrusion has an inner surface located on the through-hole side and an outer surface located outside the inner surface, The lens according to claim 1, wherein the first light-transmitting portion is composed of the inner surface of the annular convex portion and the second main surface of the main body portion on the light-emitting surface, and includes an annular first concave surface surrounding the through hole.

7. The lens according to claim 6, wherein there is an air layer between the outer surface of the annular protrusion and the second main surface of the main body.

8. In a top view, the light source includes a first light-emitting unit located in the central region and a second light-emitting unit located in the outer peripheral region, which is positioned on the outer periphery of the central region, and the first and second light-emitting units are individually driveable. A lens according to any one of claims 1 to 6, which is positioned above the light source, It has, The light source is arranged such that, in a top view, the first light-emitting portion overlaps with the through-hole. The light emitted from the first light-emitting part is irradiated through the through hole at a first half-value full angle, and the light emitted from the second light-emitting part is irradiated through the annular protrusion at a second half-value full angle. A light-emitting module in which the first half-width full-width is smaller than the second half-width full-width.

9. The light-emitting module according to claim 8, wherein, of the light emitted from the second light-emitting portion, the light irradiated through the annular protrusion propagates in a direction toward the central axis of the first light-transmitting portion and irradiates the irradiation surface.

10. The light-emitting module according to claim 8, wherein the second light-emitting unit includes a plurality of individually drivable light-emitting units.

11. In a top view, The light incident surface and the light emission surface each include an annular convex surface surrounding the through hole, The annular protrusion surrounds the annular convex surface and is positioned on the light incident surface. The light source includes a rectangular light-emitting region, The light-emitting module according to claim 8, wherein the annular protrusion and the corner of the light-emitting region overlap.

12. The lens has a first support portion that supports the first light-transmitting portion, The light-transmitting member further includes a second light-transmitting portion facing the light-emitting surface of the lens, and a second support portion supporting the second light-transmitting portion. The light-emitting module according to claim 8, wherein the first support portion is fixed to the second support portion.

13. The lens is the lens described in claim 4, The light emitted from the first light-emitting portion and refracted or reflected by the first convex portion includes the first ray, The light emitted from the second light-emitting portion and refracted or reflected by the second protrusion includes a second ray. The light-emitting module according to claim 8, wherein the angle between the second ray and the central axis of the first light-transmitting portion is greater than the angle between the first ray and the central axis of the first light-transmitting portion.

14. The lens is the lens described in claim 6, The light-emitting module according to claim 8, wherein the light emitted from the first light-emitting portion includes light irradiated through the through hole and light refracted or reflected by the outer surface of the annular protrusion.

15. The lens is the lens described in claim 6, The light-emitting module according to claim 8, wherein at least a portion of the light emitted from the second light-emitting section is diffused by the annular first concave surface.

16. The lens is the lens described in claim 6, The light-emitting module according to claim 8, wherein the light incident surface of the first light-transmitting portion has an annular second concave surface at a position that overlaps with the second light-emitting portion when viewed from above.

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