Light source device

Abstract

To provide a light source device in which a plurality of light emitting elements are individually lit and which has two or more patterns of light distribution.SOLUTION: A light source device according to an embodiment of the present invention includes a light-emitting portion assembly including a first light emitting portion having a first light-emitting element, and a second light-emitting portion provided along the outer periphery of the first light-emitting portion in plan view and having a plurality of second light-emitting elements, and a lens arranged on the light-emitting portion assembly, and the first light-emitting element and the plurality of second light-emitting elements are arranged vertically and horizontally, each of the first light-emitting element and the plurality of second light-emitting elements can be independently controlled to emit light, and the half-value full angle of the light emitted from the first light-emitting portion and emitted from the lens is different from the half-value full angle of the light emitted from the second light-emitting portion and emitted from the lens.SELECTED DRAWING: Figure 2B

Description

Technical Field

[0001] The present disclosure relates to a light source device.

Background Art

[0002] Patent Document 1 discloses an LED light-emitting device including a first light-emitting portion and a second light-emitting portion each having an LED element group and formed concentrically on a circuit board, and a lens disposed above the first light-emitting portion and the second light-emitting portion, wherein the first light-emitting portion and the second light-emitting portion are independently driven to emit light.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present disclosure is to provide a light source device in which a plurality of light-emitting elements are individually lit and have a light distribution of two or more patterns.

Means for Solving the Problems

[0005] A light source device according to an embodiment of the present disclosure includes a light-emitting unit assembly including a first light-emitting portion having a first light-emitting element and a second light-emitting portion provided apart along an outer periphery of the first light-emitting portion in a plan view and having a plurality of second light-emitting elements, and a lens disposed on the light-emitting unit assembly, wherein the first light-emitting element and the plurality of second light-emitting elements are arranged vertically and horizontally, the first light-emitting element and the plurality of second light-emitting elements are each independently controllable to emit light, and a half-value full angle of a light distribution of light emitted from the first light-emitting portion and emitted from the lens is different from a half-value full angle of a light distribution of light emitted from the second light-emitting portion and emitted from the lens.

[0006] A light source device according to one embodiment of the present disclosure comprises a light-emitting unit assembly having a first light-emitting unit having a first light-emitting unit and a second light-emitting unit having a second light-emitting unit, and a lens disposed on the light-emitting unit assembly, characterized in that, in a plan view, the second light-emitting unit is arranged spaced apart along the outer circumference of the first light-emitting unit and consists of one second light-emitting unit. [Effects of the Invention]

[0007] According to one embodiment of the present disclosure, a light source device can be provided in which multiple light-emitting elements are individually lit and have two or more light distribution patterns. [Brief explanation of the drawing]

[0008] [Figure 1A] This is a schematic plan view showing the configuration of the light source device of Embodiment 1. [Figure 1B] This is an end view of line segment AA in Figure 1A, schematically showing the configuration of the light source device of Embodiment 1. [Figure 2A] These are schematic plan views showing the first light-emitting section and the second light-emitting section of the light source device of Embodiment 1. [Figure 2B] This is a schematic plan view showing an embodiment in which a second light-emitting unit, having at least two spaced light-emitting elements, surrounds a first light-emitting unit. [Figure 2C] This is a schematic end view showing the cross-section of the second light-emitting section at line segments III-III and IV-IV in Figure 2B. [Figure 2D] This is a schematic bottom view of the light-emitting assembly. [Figure 2E] This is a schematic plan view showing a second light-emitting section having one light-emitting element arranged at a distance from the outer circumference of the first light-emitting section. [Figure 2F] This is a schematic end view showing the cross-section of the second light-emitting section at line segment II in Figure 2E. [Figure 2G] This is a schematic end view showing the cross-section of the light-emitting assembly along line segment II-II in Figure 2E. [Figure 3A] This is a schematic end view showing the configuration of the light-emitting assembly (including the first and second light-emitting parts) before illumination. [Figure 3B] It is an end view schematically showing the state at the time of light emission of the first light emitting part. [Figure 3C] It is an end view schematically showing the state at the time of light emission of the second light emitting part. [Figure 4A] It is an end view schematically showing the light distribution control state of the emitted light of the first light emitting part by the Fresnel lens. [Figure 4B] It is an end view schematically showing the light distribution control (ultra-wide angle light distribution control) state of the emitted light of the first light emitting part by the Fresnel lens. [Figure 4C] It is an end view schematically showing the light distribution control (ultra-narrow angle light distribution control) state of the emitted light of the first light emitting part by the Fresnel lens. [Figure 4D] [[ID=,17]]It is an end view schematically showing the light distribution control state of the emitted light of the second light emitting part by the Fresnel lens. [Figure 4E] It is an end view schematically showing the light distribution control (wide angle light distribution control) state of the emitted light of the second light emitting part by the Fresnel lens. [Figure 4F] It is an end view schematically showing the light distribution control (narrow angle light distribution control) state of the emitted light of the second light emitting part by the Fresnel lens. [Figure 5A] It is a plan view schematically showing the configuration of the light source device of Embodiment 2. [Figure 5B] It is an end view at the line segment B-B of FIG. 5A schematically showing the state where the light distribution of each of the first light emitting part and the third light emitting part of the light emitting part combination corresponding to each of the two Fresnel lenses is controlled by the lens. [Figure 5C] It is an end view at the line segment B-B of FIG. 5A schematically showing the state where the light distribution of each of the second light emitting part and the fourth light emitting part of the light emitting part combination corresponding to each of the two Fresnel lenses is controlled by the lens. [Figure 6A] It is a plan view schematically showing the preparation process of the wavelength conversion member sheet. [Figure 6B] It is an end view at the line segment 6a-6a of FIG. 6A schematically showing the preparation process of the wavelength conversion member sheet. [Figure 6C]It is a plan view schematically showing the process of fragmenting the wavelength conversion member sheet. [Figure 6D] It is an end view taken along line 6b - 6b of FIG. 6C, schematically showing the process of fragmenting the wavelength conversion member sheet. [Figure 6E] It is a plan view schematically showing the process of installing the light - emitting element. [Figure 6F] It is an end view taken along line 6c - 6c of FIG. 6E, schematically showing the process of installing the light - emitting element. [Figure 6G] It is a plan view schematically showing the process of supplying the reflective member material. [Figure 6H] It is an end view taken along line 6d - 6d of FIG. 6G, schematically showing the process of supplying the reflective member material. <0000·107> [Figure 6I] It is a plan view schematically showing the process of grinding the reflective member material. [Figure 6J] It is an end view taken along line 6e - 6e of FIG. 6I, schematically showing the process of grinding the reflective member material. [Figure 6K] It is a plan view schematically showing the dicing process. [Figure 6L] It is an end view taken along line 6f - 6f of FIG. 6K, schematically showing the dicing process. [Figure 6M] It is a plan view schematically showing the obtained light - emitting unit assembly. [Figure 6N] It is an end view taken along line g - 6g of FIG. 6M, schematically showing the obtained light - emitting unit assembly. [Figure 6O] It is a bottom view schematically showing the obtained light - emitting unit assembly. [Figure 7A] It is a plan view schematically showing the process of preparing the aggregate plate of light - emitting elements whose sides are covered with the reflective member material. [Figure 7B] It is an end view taken along line 7a - 7a of FIG. 7A, schematically showing the process of preparing the aggregate plate of light - emitting elements whose sides are covered with the reflective member material. [Figure 7C] It is a plan view schematically showing the process of installing the phosphor - containing block. [Figure 7D]This is an end view of the line segment 7b-7b in Figure 7C, schematically illustrating the installation process of the phosphor-containing block. [Figure 7E] This is a schematic plan view illustrating the supply process for reflective material. [Figure 7F] This is an end view of the line segment 7c-7c in Figure 7E, schematically illustrating the supply process for the reflective material. [Figure 7G] This is a schematic plan view illustrating the grinding process for reflective material. [Figure 7H] This is an end view of the line segment 7d-7d in Figure 7G, schematically illustrating the grinding process of the reflective material. [Figure 7I] This is a schematic plan view illustrating the dicing process. [Figure 7J] This is an end view of the line segment 7e-7e in Figure 7I, schematically illustrating the dicing process. [Figure 7K] This is a schematic plan view showing the resulting light-emitting assembly. [Figure 7L] This is an end view of the line segment 7f-7f in Figure 7K, schematically showing the obtained light-emitting assembly. [Figure 7M] This is a schematic bottom view showing the resulting light-emitting assembly. [Figure 8A] This is a schematic plan view illustrating the preparation process for the reflective material plate. [Figure 8B] This is an end view of the line segment 8a-8a in Figure 8A, schematically illustrating the preparation process for the reflective member plate. [Figure 8C] This is a schematic plan view illustrating the punching process for a reflective material plate. [Figure 8D] This is an end view of the line segment 8b-8b in Figure 8C, schematically illustrating the punching process of the reflective member plate. [Figure 8E] This is a schematic plan view illustrating the supply process for phosphor-containing resin materials. [Figure 8F] This is an end view of the line segment 8c-8c in Figure 8E, schematically illustrating the supply process of the phosphor-containing resin material. [Figure 8G] This is a schematic plan view illustrating the punching process for a phosphor-containing resin material. [Figure 8H] This is an end view of the line segment 8d-8d in Figure 8G, schematically illustrating the punching process of a phosphor-containing resin material. [Figure 8I] This is a schematic plan view illustrating the supply process for reflective material. [Figure 8J] This is an end view of the line segment 8e-8e in Figure 8I, schematically illustrating the supply process for the reflective material. [Figure 8K] This is a schematic plan view illustrating the punching process for reflective material. [Figure 8L] This is an end view of the line segment 8f-8f in Figure 8K, schematically illustrating the punching process for the reflective material. [Figure 8M] This is a schematic plan view illustrating the supply process for phosphor-containing resin materials. [Figure 8N] This is an end view of the line segment 8g-8g in Figure 8M, schematically illustrating the supply process of the phosphor-containing resin material. [Figure 8O] This is a schematic plan view illustrating the installation process of an assembly plate of light-emitting elements, whose sides are covered with a reflective material. [Figure 8P] This is an end view of the line segment 8h-8h in Figure 8O, schematically showing the installation process of an assembly plate of light-emitting elements whose sides are covered with a reflective material. [Figure 8Q] This is a schematic plan view illustrating the dicing process. [Figure 8R] This is an end view of the line segment 8i-8i in Figure 8Q, schematically illustrating the dicing process. [Modes for carrying out the invention]

[0009] <Light source device> The following describes an embodiment of the present invention's light source device with reference to the drawings.

[0010] The embodiments described are intended to embody the technical concept of the present invention, and unless otherwise specified, the present invention is not limited to those described below. In each drawing, components having the same function may be denoted by the same reference numeral. For convenience, embodiments may be shown separately to facilitate explanation or understanding of key points, but partial substitution or combination of configurations shown in different embodiments is possible. Furthermore, in later embodiments, descriptions of matters common to those described above will be omitted, and only the differences will be described. In particular, similar effects and advantages due to similar configurations will not be mentioned sequentially in each embodiment. The size and positional relationships of components shown in each drawing may be exaggerated to clarify the explanation.

[0011] [Embodiment 1] Figure 1A is a schematic plan view showing the configuration of the light source device of Embodiment 1. Figure 1B is a schematic end view of the line segment AA in Figure 1A, showing the configuration of the light source device of Embodiment 1. Figure 2A is a schematic plan view showing the first light-emitting unit and the second light-emitting unit of the light source device of Embodiment 1, respectively. Figure 3A is a schematic end view showing the state of the light-emitting unit assembly (including the first and second light-emitting units) before light emission. Figure 3B is a schematic end view showing the state of the first light-emitting unit during light emission. Figure 3C is a schematic end view showing the state of the second light-emitting unit during light emission.

[0012] The light source device 100 of Embodiment 1 comprises a light-emitting unit assembly 10 and a lens 20. The light-emitting unit assembly 10 comprises a first light-emitting unit 10A having a first light-emitting element 12A, and a second light-emitting unit having a plurality of second light-emitting elements 12B, which are spaced apart along the outer circumference of the first light-emitting unit 10A in a plan view. The light-emitting unit assembly 10 is an integral combination of the first light-emitting unit 10A and the second light-emitting unit 10B. The lens 20 is arranged on the light-emitting unit assembly 10. The first light-emitting element 12A and the plurality of second light-emitting elements 12B are arranged vertically and horizontally, and each can be independently controlled to light up. Furthermore, the full angle of half maximum of the light distribution of the light emitted from the first light-emitting unit 10A and emitted from the lens 20 is different from the full angle of half maximum of the light distribution of the light emitted from the second light-emitting unit 10B and emitted from the lens 20. The light source device of Embodiment 1 can be suitably used as a flash light source.

[0013] In this specification, "light-emitting unit assembly" refers to a structure formed by combining two or more light-emitting units into a single unit. In this specification, lens 20 includes a Fresnel lens. A "Fresnel lens" is a type of collimating lens that refracts light emitted from a light-emitting unit, giving it directionality towards a desired illumination area.

[0014] As will be described later, the first light-emitting section 10A and the second light-emitting section 10B each have a light-emitting element such as an LED (Light Emitting Diode). The light emitted from the first light-emitting section 10A and the second light-emitting section 10B has a light distribution intensity characteristic (referred to as Lambert distribution or Lambert light distribution) in which the amount of light is greatest in the direction of the surface normal of the light-emitting surface, and the amount of light gradually decreases as the inclination of the light rays from the surface normal increases. Here, in this specification, the light distribution of light emitted from a lens is broadly divided into four patterns: ultra-wide-angle light distribution, wide-angle light distribution, ultra-narrow-angle light distribution, and narrow-angle light distribution. "Wide-angle light distribution" refers to a light distribution that has a half-width angle greater than the half-width angle of the standard time when the half-width angle of the Lambert light distribution of the first light-emitting section is taken as the half-width angle of the standard time. "Ultra-wide beam angle distribution" refers to a beam angle distribution that has a half-width angle even larger than the half-width angle of the standard Lambert beam distribution of the first light-emitting unit (i.e., a half-width angle larger than the half-width angle of the wide beam distribution), when the half-width angle of the Lambert beam distribution of the first light-emitting unit is taken as the half-width angle of the standard Lambert beam distribution. "Narrow beam angle distribution" refers to a beam angle distribution that has a half-width angle smaller than the half-width angle of the standard Lambert beam distribution of the first light-emitting unit. "Ultra-narrow beam angle distribution" refers to a beam angle distribution that has a half-width angle even smaller than the half-width angle of the standard Lambert beam distribution of the first light-emitting unit (i.e., a half-width angle smaller than the half-width angle of the narrow beam distribution), when the half-width angle of the Lambert beam distribution of the first light-emitting unit is taken as the half-width angle of the standard Lambert beam distribution. The fact that the full-angle half-value (FHA) of the light distribution emitted from the first light-emitting unit 10A and exiting the lens 20 is different from the full-angle half-value (FHA) of the light distribution emitted from the second light-emitting unit 10B and exiting the lens 20 means that the light emitted from the first light-emitting unit 10A and exiting the lens 20 and the light emitted from the second light-emitting unit 10B and exiting the lens 20 have different FHAs for each of the four light distribution patterns described above. In the case of wide-angle light distribution control and ultra-wide-angle light distribution control, the full-angle half-value (FHA) of the light distribution emitted from the second light-emitting unit 10B and exiting the lens 20 can be larger than the full-angle half-value (FHA) of the light distribution emitted from the first light-emitting unit 10A and exiting the lens 20, based on the fact that the full-angle half-value (FHA) of the light distribution emitted from the second light-emitting unit 10B and exiting the lens 20 is larger than the FHAs for the standard conditions described above.Furthermore, taking the cases of narrow-angle and ultra-narrow-angle light distribution control as examples, based on the fact that the full-angle half-width of the light distribution of the light emitted from the second light-emitting unit 10B and emitted from the lens 20 is smaller than the full-angle half-width of the light distribution of the light emitted from the first light-emitting unit 10A and emitted from the lens 20, the full-angle half-width of the light distribution of the light emitted from the second light-emitting unit 10B and emitted from the lens 20 may be smaller than the full-angle half-width of the light distribution of the light emitted from the second light-emitting unit 10B and emitted from the lens 20.

[0015] In the light source device 100 of Embodiment 1, the light distribution of the light emitted from the first light-emitting unit 10A and the second light-emitting unit 10B can be controlled by a single lens 20, without the need to use two or more lenses. This makes it possible to achieve two or more light distribution patterns with a single lens 20.

[0016] The lens 20 is positioned on the light-emitting assembly 10 so as to straddle the first light-emitting unit 10A and the second light-emitting unit 10B. Specifically, one lens 20 is positioned on one light-emitting assembly 10. That is, in a plan view, the first light-emitting unit 10A and the second light-emitting unit 10B (corresponding to the light-emitting assembly 10) are positioned within the region of one lens 20. In other words, a light-emitting assembly 10 consisting of two or more light-emitting units shares one lens 20. As an example, one light-emitting assembly 10 is positioned within the region of one Fresnel lens.

[0017] According to the light source device 100 of Embodiment 1, two or more light distribution patterns are possible with one lens 20 and a light-emitting unit assembly 10 located within the area of ​​the lens 20. Therefore, the light source device 100 can be miniaturized and is suitable for use in smartphones.

[0018] The following describes the light-emitting assembly 10 and the lens 20, which are components of the light source device 100 of Embodiment 1 described above.

[0019] (Light-emitting unit assembly 10) As shown in Figure 1A, the light-emitting assembly 10 is an integral combination of at least two light-emitting parts (a first light-emitting part 10A and a second light-emitting part 10B). Specifically, the light-emitting assembly 10 has a first light-emitting part 10A and a second light-emitting part 10B, and in a plan view, the second light-emitting part 10B is provided so as to surround at least a part of the first light-emitting part 10A. As shown in Figure 2A, in a plan view, the first light-emitting part 10A is provided in the area 50 inside the second light-emitting part 10B. In other words, the first light-emitting part 10A is located in the central area of ​​the light-emitting assembly 10. It is preferable that the first light-emitting part 10A and the second light-emitting part 10B are not in direct contact with each other from the viewpoint of preventing light propagation.

[0020] In the light source device 100 of Embodiment 1, the first light-emitting unit 10A and the second light-emitting unit 10B are each capable of emitting a first light of substantially the same color. The first light-emitting unit 10A and the second light-emitting unit 10B are each connected to the wiring of the substrate 30. In this embodiment, substantially the same color means that the light emitted from the first light-emitting unit and the second light-emitting unit has a color difference (corresponding to the difference in chromaticity) Δu'v' of 0.05 or less in the CIE 1976 (L*, u*, v*) color space.

[0021] Morphology of the first light-emitting section and the second light-emitting section The planar shape of the first light-emitting section 10A can be a square, rectangle, circle, ellipse, and / or polygon. Similarly, the planar shapes of the outer portion 10B1 and inner portion 10B2 of the second light-emitting section 10B surrounding the first light-emitting section 10A can also be a square, rectangle, circle, ellipse, and / or polygon in plan view. Note that the planar shapes of the outer portion 10B1 and inner portion 10B2 of the second light-emitting section 10B may be different. While not particularly limited, from the viewpoint of suitably ensuring the integrity of the light-emitting section assembly 10, it is preferable that the planar contour of the first light-emitting section 10A is similar to the planar contours of the outer portion 10B1 and inner portion 10B2 of the second light-emitting section 10B.

[0022] The first light-emitting section 10A includes a first light-emitting element 12A. For example, as shown in Figure 1B, the first light-emitting section 10A may include a wavelength conversion member 11A provided on the light-emitting surface of the first light-emitting element 12A in addition to the first light-emitting element 12A. The second light-emitting section 10B includes a second light-emitting element 12B. For example, as shown in Figure 1B, the second light-emitting section 10B may include a wavelength conversion member 11B provided on the light-emitting surface of the second light-emitting element 12B in addition to the second light-emitting element 12B. One wavelength conversion member 11A may be provided on the light-emitting surface of each first light-emitting element 12A, or multiple first light-emitting elements 12A may have a common wavelength conversion member 11A. Alternatively, one wavelength conversion member 11B may be provided on the light-emitting surface of each second light-emitting element 12B, or multiple second light-emitting elements 12B may have a common wavelength conversion member 11B. It is preferable that the wavelength conversion member 11B be arranged to surround the outer circumference of the first light-emitting section 10A. A wavelength conversion member 11B surrounding the outer circumference of the first light-emitting portion 10A may be arranged on the light-emitting surface side of the second light-emitting element 12B.

[0023] While not particularly limited, the proportion of the first light-emitting part 10A in the light-emitting assembly 10 in a plan view can be 50% to 90% or 60% to 80%, for example, 70%. The proportion of the second light-emitting part 10B in the light-emitting assembly 10 in a plan view can be 10% to 50% or 20% to 40%, for example, 30%. Note that the proportion of the first light-emitting part 10A in the light-emitting assembly 10 in a plan view refers to the area percentage of the wavelength conversion member 11A in a plan view, and the proportion of the second light-emitting part 10B in the light-emitting assembly 10 in a plan view refers to the area percentage of the wavelength conversion member 11B in a plan view.

[0024] In both Embodiment 1 and Embodiment 2 described below, the second light-emitting section 10BI and the fourth light-emitting section 10BII, which are components of the first light-emitting section assembly 10I and the second light-emitting section assembly 10II, can be provided so as to surround at least a portion of the first light-emitting section 10AI and the third light-emitting section 10AII. The first light-emitting section 10AI and the third light-emitting section 10AII, which are components of the first light-emitting section assembly 10I and the second light-emitting section assembly 10II, include, for example, a first light-emitting element 12AI and a third light-emitting element 12AII, and wavelength conversion members 11AI and 11AII provided on the light-emitting surfaces of the first light-emitting element 12AI and the third light-emitting element 12AII, respectively. Furthermore, the second light-emitting section 10BI and the fourth light-emitting section 10BII, which are components of the first light-emitting section assembly 10I and the second light-emitting section assembly 10II, include a second light-emitting element 12BI and a fourth light-emitting element 12BII, and wavelength conversion members 11BI and 11BII provided on the light-emitting surfaces of the second light-emitting element 12BI and the fourth light-emitting element 12BII, respectively.

[0025] In this case, in both Embodiment 1 described above and Embodiment 2 described below, the second light-emitting unit can be broadly divided into two forms.

[0026] Figure 2B is a schematic plan view showing an configuration in which a second light-emitting section, having at least two spaced light-emitting elements, surrounds a first light-emitting section. Figure 2C is a schematic cross-sectional view showing the cross-section of the second light-emitting section along lines III-III and IV-IV in Figure 2B. Figure 2D is a schematic bottom view of the light-emitting section assembly.

[0027] As shown in Figures 2B, 2C, and 2D, the second light-emitting section 10BY has at least two second light-emitting elements 12BY, and in a plan view, these at least two second light-emitting elements 12BY are arranged adjacent to each other so as to surround at least a portion of the first light-emitting section 10AY. That is, the second light-emitting section 10BY surrounding the first light-emitting section 10AY having the first light-emitting element 12AY has at least two spaced-apart second light-emitting elements 12BY. The first light-emitting element 12AY and the plurality of second light-emitting elements 12BY are arranged vertically and horizontally (in other words, arranged in a grid) to form a lattice.

[0028] In this case, by independently controlling the lighting of at least two second light-emitting elements 12BY that are spaced apart, light can be emitted from the second light-emitting section 10BY. In the second light-emitting section 10BY surrounding the first light-emitting section 10AY, it is preferable that reflective members 13 are placed on the sides of each spaced-apart light-emitting element. Furthermore, it is preferable that reflective members 13 are also placed between the side of a wavelength conversion member 11BY located on one adjacent second light-emitting element 12BY and the side of a wavelength conversion member 11BY located on the other second light-emitting element 12BY. That is, it is preferable to have reflective members 13 between adjacent wavelength conversion members 11BY. This makes it possible to prevent color unevenness and brightness unevenness caused by light emitted from adjacent first light-emitting elements 12AY and second light-emitting elements 12BY.

[0029] In the configurations shown in Figures 2B to 2D, since adjacent second light-emitting elements 12BY of the second light-emitting unit 10BY are spaced apart, the second light-emitting elements 12BY and the wiring of the substrate connected below the second light-emitting unit 10BY are connected individually. This allows for simultaneous and independent illumination control of at least two second light-emitting elements 12BY, or alternatively, independent illumination control of at least two second light-emitting elements 12BY at different timings.

[0030] Furthermore, in Figures 2B and 2C, the first light-emitting element 12AY, the wavelength conversion member 11AY, the second light-emitting element 12BY, and the wavelength conversion member 11BY are all arranged at equal intervals, but this is not limited to this. That is, the spacing between adjacent light-emitting elements and between wavelength conversion members may differ. Also, in Figures 2B to 2D, one first light-emitting element 12AY is arranged as the first light-emitting section 10AY, but this is not limited to this. That is, the first light-emitting section 10AY may have two or more first light-emitting elements 12AY. In this case, it is preferable that the two or more light-emitting elements AY are arranged in a matrix.

[0031] Figure 2E is a schematic plan view showing a second light-emitting section having one light-emitting element spaced apart along the outer circumference of the first light-emitting section. Figure 2F is a schematic end view showing a cross-section of the second light-emitting section along line segment II in Figure 2E. Figure 2G is a schematic end view showing a cross-section of the light-emitting section assembly along line segment II-II in Figure 2E.

[0032] As shown in Figures 2E, 2F, and 2G, the second light-emitting section 10BX has one second light-emitting element 12BX, and in a plan view, the second light-emitting section is arranged spaced apart along the outer circumference of the first light-emitting section and consists of one second light-emitting element.

[0033] In this case, by independently controlling the lighting of the second light-emitting unit 10BX, which has one second light-emitting element 12BX, light can be emitted from the second light-emitting unit 10BX.

[0034] Furthermore, in Figures 2E, 2F, and 2G, the second light-emitting element 12BX of the second light-emitting unit 10BX has a shape that continuously surrounds the outer periphery of the first light-emitting unit 10AX, thus ensuring a wide area where the light-emitting surface of the second light-emitting element 12BX and the wavelength conversion member 11BX are in direct contact. As a result, light can be directly guided from the second light-emitting element 12BX into the wavelength conversion member 11BX, enabling more efficient wavelength conversion of light. In addition, the connection between the second light-emitting unit 10BX and the wiring of the substrate connected below the second light-emitting unit 10BX can be simplified.

[0035] The first light-emitting element 12A of the first light-emitting section 10A and the second light-emitting element 12B of the second light-emitting section may have any shape in plan view. For example, the first light-emitting element 12A of the first light-emitting section 10A and the second light-emitting element 12B of the second light-emitting section may be square, rectangular, and / or polygonal in plan view. If the first light-emitting element 12A is rectangular in plan view, the first light-emitting element 12A of the first light-emitting section 10A may have vertical and horizontal dimensions of, for example, 200 μm to 2 mm, preferably 500 μm to 1.5 mm, and more preferably 800 μm to 1 mm in plan view. Also, as will be described later, if the second light-emitting element 12B of the second light-emitting section 10B is rectangular in plan view and consists of one second light-emitting element BX, the vertical and horizontal dimensions of the outer contour of the second light-emitting element 12B may be, for example, 500 μm to 3 mm, preferably 1 mm to 2.5 mm, and more preferably 1.5 mm to 2.0 mm in plan view. When the second light-emitting element 12B of the second light-emitting section 10B consists of one second light-emitting element 12BX, the vertical and horizontal dimensions of the inner contour of the second light-emitting element 12BX may be, for example, 200 μm or more and 2 mm or less in a plan view, preferably 500 μm or more and 1.5 mm or less, and more preferably 800 μm or more and 1 mm or less.

[0036] Furthermore, if the second light-emitting section 10B has a plurality of rectangular second light-emitting elements 12B spaced apart from each other, each second light-emitting element 12B may have a length and width dimension of, for example, 100 μm or more and 2 mm or less, preferably 200 μm or more and 1.5 mm or less in a plan view. The height (height from the light-emitting surface to the electrode surface) of each of the first light-emitting elements 12A of the first light-emitting section 10A and the second light-emitting elements 12B (or second light-emitting elements 12BX) of the second light-emitting section may be 10 μm or more and 300 μm or less, preferably 150 μm or more and 300 μm or less.

[0037] The substrate 30 is a wiring board with positive and negative wiring provided on its upper surface. For example, by providing input / output terminals for each wiring corresponding to the first light-emitting element 12A and the second light-emitting element 12B, the lighting can be controlled independently for each light-emitting element as described above, and therefore, the lighting can be controlled independently for each light-emitting part. The main material of the substrate 30 is preferably an insulating material that does not easily transmit light from the light-emitting elements. For example, the substrate 30 may contain ceramic material and resin material.

[0038] The above-mentioned light-emitting elements (first light-emitting element 12A, second light-emitting element 12B, third light-emitting element 12AII, and fourth light-emitting element 12BII) each comprise a semiconductor laminate and at least one pair of electrodes 40 with different polarities (positive electrode 41 and negative electrode 42). The light-emitting element comprises a light-emitting surface (also called the main light-emitting surface), a side surface extending in a different direction (e.g., perpendicular direction) to the light-emitting surface, and an electrode surface on the opposite side of the light-emitting surface, on which at least one positive and negative electrode is provided. As the light-emitting element, a semiconductor light-emitting element capable of emitting light of any wavelength can be selected. For example, a light-emitting diode can be selected as the light-emitting element. As an example, a light-emitting element that emits blue light can be used. However, it is not limited to this, and a light-emitting element that emits light of a color other than blue light may be used as the light-emitting element.

[0039] For example, a nitride-based semiconductor (InxAlyGa1-x-yN, 0≦X, 0≦Y, X+Y≦1) can be used as the semiconductor laminate for a light-emitting element capable of emitting blue light. In this case, the nitride-based semiconductor light-emitting element has, for example, a sapphire substrate and a nitride-based semiconductor laminated structure stacked on the sapphire substrate. The nitride-based semiconductor laminated structure includes a light-emitting layer and an n-type nitride-based semiconductor layer and a p-type nitride-based semiconductor layer arranged so as to sandwich the light-emitting layer. The n-type nitride-based semiconductor layer and the p-type nitride-based semiconductor layer are electrically connected to the n-side electrode and the p-side electrode, respectively.

[0040] Wavelength conversion members (wavelength conversion member 11A and wavelength conversion member 11B) are provided on the light-emitting surface side of the light-emitting element and are capable of absorbing light emitted from the light-emitting element and converting it into light of a different wavelength. Wavelength conversion members include, for example, a phosphor in a base material such as resin or glass. Examples of phosphors include yttrium aluminum garnet phosphors (e.g., Y3(Al,Ga)5O 12 Ce), lutetium-aluminum-garnet phosphors (e.g., Lu3(Al,Ga)5O 12 Ce), terbium aluminum garnet phosphors (e.g., Tb3(Al,Ga)5O 12 :Ce), β-sialon phosphors (e.g., (Si,Al)3(O,N)4:Eu), α-sialon phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 Nitride-based phosphors such as (Sr,Ca)AlSiN3:Eu), CASN-based phosphors (e.g., CaAlSiN3:Eu), or SCASN-based phosphors (e.g., (Sr,Ca)AlSiN3:Eu), fluoride-based phosphors such as KSF-based phosphors (e.g., K2SiF6:Mn), KSAF-based phosphors (e.g., K2(Si,Al)F6:Mn), or MGF-based phosphors (e.g., 3.5MgO·0.5MgF2·GeO2:Mn), perovskite-structured phosphors (e.g., CsPb(F,Cl,Br,I)3), or quantum dot phosphors (e.g., CdSe, InP, AgInS2, AgInSe2, AgInGaS2, or CuAgInS2) can be used. The phosphor may contain one of the above types alone, or it may contain multiple types of phosphors.

[0041] Furthermore, in each of the first light-emitting section 10A and the second light-emitting section 10B, a reflective member 13 can be provided that covers the sides of the light-emitting element and the sides of the wavelength conversion member, excluding the upper surfaces of the wavelength conversion member 11A and the wavelength conversion member 11B. The reflective member 13 is a member that facilitates guiding the light emitted from the light-emitting element in a predetermined direction.

[0042] The reflective member 13 may be composed of, for example, a base resin and a light-reflective substance contained in the base resin. As the base resin, silicone resin, modified silicone resin, epoxy resin, modified epoxy resin, acrylic resin, and hybrid resins containing at least one of these resins can be used.

[0043] As the light-reflecting material, at least one selected from titanium dioxide, silicon dioxide, zirconium dioxide, magnesium dioxide, yttrium dioxide, yttria-stabilized zirconia, calcium carbonate, calcium hydroxide, calcium silicate, niobium dioxide, zinc dioxide, barium titanate, potassium titanate, magnesium fluoride, alumina, aluminum nitride, boron nitride, and mullite can be used.

[0044] Furthermore, from the viewpoint of suitably reflecting the light emitted from the light-emitting element, the reflective member 13 may be a white resin having a reflectance of, for example, 60% or more for said light, and preferably a white resin having a reflectance of 90% or more.

[0045] A translucent member can also be provided between the side surface of the light-emitting element and the reflective member 13 and / or on the light-emitting surface of the light-emitting element. Examples of materials for the translucent member include silicone resins, epoxy resins, and acrylic resins.

[0046] (Lens 20) The lens 20 is positioned on the light-emitting unit assembly 10 so as to straddle the first light-emitting unit 10A and the second light-emitting unit 10B. This allows the lens 20 to receive light emitted from each light-emitting unit and to emit the received light in a predetermined direction. Specifically, one lens 20 positioned on one light-emitting unit assembly 10 has an incident surface 20a into which light emitted from the light-emitting unit assembly 10 (light emitted from the first light-emitting unit 10A and the second light-emitting unit 10B) enters, and an exit surface 20b from which this light exits. For example, a Fresnel lens can be used for the lens 20, and it has multiple concentric annular protrusions on the incident surface (corresponding to the bottom surface) 20a of the lens 20 (see Figures 1B, 3A-3C, 4A-4F, etc.). The lens 20 has, on its lower surface 20a, a first convex portion 21, a second convex portion 22, a third convex portion 23, a fourth convex portion 24, a fifth convex portion 25, and a sixth convex portion 26, in order from the center of the lens 20. The emission surface (corresponding to the upper surface) 20b of one lens 20 is flat.

[0047] The first protrusion 21 located in the center may be composed of a convex curved surface 21a, as shown in Figure 1B, but from the viewpoint of light distribution characteristics, it may have a plurality of minute protrusion members 21b arranged concentrically around the convex curved surface 21a (see Figures 4A and 4D). Each minute protrusion member 21b has an incident surface and a reflective surface.

[0048] In Figure 1B, when viewed from the end face, the area size of the convex curved surface of the central first protrusion 21 is larger than the area size of the other protrusions. However, without being limited to this, considering the desired illumination range of the light emitted from the lens's emission surface (corresponding to the top surface) 20b, the area size of the convex curved surface of the central first protrusion 21 can also be approximately the same as the area size of the other protrusions.

[0049] The second, third, fourth, fifth, and sixth protrusions 22, 23, 24, 25, and 26 are each annular protrusions in plan view. The second protrusion 22 has an incident surface 22a and a reflective surface 22b, the third protrusion 23 has an incident surface 23a and a reflective surface 23b, the fourth protrusion 24 has an incident surface 24a and a reflective surface 24b, the fifth protrusion 25 has an incident surface 25a and a reflective surface 25b, and the sixth protrusion 24 has an incident surface 24a and a reflective surface 24b (see Figure 1B).

[0050] The first light-emitting portion 10A is aligned with the first convex portion 21 of the lens 20 in a plan view, and the center of the first light-emitting portion 10A is positioned so that it approximately coincides with the concentricity (in other words, optical axis B) of the Fresnel lens of the lens 20. Furthermore, in an end view, the second light-emitting portion 10B is positioned, for example, directly below the third convex portion 23 and the fourth convex portion 24, and inward and below the fifth convex portion 25 and the sixth convex portion 24.

[0051] The following describes the paths of light emitted from the light-emitting surface of each light-emitting part as it passes through the lens 20 having the above-described convex parts (see Figures 3A, 3B, 3C, 4A to 4F). In this embodiment, for explanatory purposes, the paths of some of the light emitted from each light-emitting part may be illustrated as rays with arrows. The angle between a ray (or light) and the optical axis of the lens refers, in detail, to the angle between a ray of some of the light emitted from each light-emitting part and the optical axis of the lens. The ray and the optical axis of the lens may intersect on their respective extensions, or they may be in skewed positions. In this embodiment, the angle between a ray and the optical axis of the lens refers to the angle between them when the ray is translated parallel to the optical axis of the lens and it is assumed that the ray and the optical axis of the lens intersect.

[0052] (When none of the light-emitting parts are lit) As described above, in the light source device 100 of Embodiment 1, each light-emitting element can be independently controlled for illumination. Therefore, the state in which none of the light-emitting elements are illuminated is shown in Figure 3A.

[0053] (When the first light-emitting unit 10A is lit) Next, we will illustrate the case where the first light-emitting unit 10A is controlled to be lit (see Figures 3B and 4A). In this case, the path of the light L1 emitted from the light-emitting surface of the first light-emitting unit 10A can be broadly divided into the following three cases. • Case 1: In the case where light is emitted from the light-emitting surface of the first light-emitting part 10A through the first protrusion 21, • Second case: Case 1: Light is emitted via protrusions (e.g., second protrusion 22, third protrusion 23, and fourth protrusion 24) located closer to the first protrusion 21 from the light-emitting surface of the first light-emitting part 10A. Third case: In the case where light is emitted via a convex portion (for example, the fifth convex portion 25 and the sixth convex portion 26) located on the side farther from the first convex portion 21 from the light-emitting surface of the first light-emitting portion 10A, the light is emitted through the convex portion.

[0054] In the first case, light emitted from the first light-emitting section 10A enters from the incident surface (convex curved surface 21a) of the first protrusion 21 and travels along the optical axis B of the lens 20. In the second case, as shown in Figure 4A, light emitted from the first light-emitting section 10A enters from, for example, the incident surfaces (incident surface 22a, incident surface 23a, and incident surface 24a) of the second protrusion 22, third protrusion 23, and fourth protrusion 24, and is then reflected by the respective reflective surfaces (reflective surface 22b, reflective surface 23b, and reflective surface 24b). In the third case, as shown in Figure 4A, light emitted from the first light-emitting section 10A enters from, for example, the incident surface 25a of the fifth protrusion and the incident surface 26a of the sixth protrusion 26, and is then reflected by the reflective surface 25b of the fifth protrusion and the reflective surface 26b of the sixth protrusion 26.

[0055] (When the second light-emitting unit 10B is lit) Next, we will explain in detail using the case where the second light-emitting unit 10B is controlled to be lit as an example (see Figures 3C and 4D). In this case, the path of the light L2 emitted from the light-emitting surface of the second light-emitting unit 10B can be broadly divided into two cases: the fourth case and the fifth case. Depending on the positional relationship between the second light-emitting unit 10B and the first protrusion 21, there may also be cases where light can be emitted from the light-emitting surface of the second light-emitting unit 10B via the first protrusion 21. • Case 4: In the case where light is emitted through protrusions (for example, the second protrusion 22, the third protrusion 23, and the fourth protrusion 24) located closer to the first protrusion 21 from the light-emitting surface of the second light-emitting part 10B, light is emitted through these protrusions. • Case 5: In the case where light is emitted through a convex portion (for example, the fifth convex portion 25 and the sixth convex portion 26) located on the side of the light-emitting surface of the second light-emitting portion 10B that is farther away from the first convex portion 21, light is emitted through this convex portion.

[0056] In the fourth case, the light emitted from the second light-emitting section 10B may be incident from, for example, the incident surfaces (incident surface 22a, incident surface 23a, and incident surface 24a) of the second protrusion 22, the third protrusion 23, and the fourth protrusion 24, and then the incident light may be reflected by the respective reflective surfaces (reflective surface 22b, reflective surface 23b, and reflective surface 24b). Alternatively, the light incident from the second light-emitting section 10B may be refracted away from the optical axis B without being reflected by the respective reflective surfaces (reflective surface 22b, reflective surface 23b, and reflective surface 24b), and exit from the exit surface 20b of the lens 20. Similarly, in the fifth case, the light from the second light-emitting section 10B may be incident from, for example, the incident surfaces (incident surface 25a, and incident surface 26a) of the fifth protrusion 25 and the sixth protrusion 26, and then the incident light may be reflected by the respective reflective surfaces (reflective surface 25b, and reflective surface 26b). Alternatively, the light incident from the second light-emitting section 10B may be refracted away from the optical axis B without being reflected by each reflective surface (reflective surface 25b and reflective surface 26b), and exit from the emission surface 20b of the lens 20.

[0057] The following will provide a detailed explanation using the third case as an example, with reference to Figures 4B and 4C. Note that the matters described below are not limited to the third case but can also be applied to the second case.

[0058] Ultra-wide beam angle control In one example, as shown in Figure 4B, in the third case, light emitted from the first light-emitting unit 10A is incident from, for example, the incident surface 25a of the fifth protrusion and the incident surface 26a of the sixth protrusion 26, and is then reflected by the reflective surface 25b of the fifth protrusion and the reflective surface 26b of the sixth protrusion 26 so that the angle with the optical axis B increases. Similarly, in the second case, light emitted from the first light-emitting unit 10A is incident from, for example, the incident surfaces (incident surface 22a, incident surface 23a, and incident surface 24a) of the second protrusion 22, the third protrusion 23, and the fourth protrusion 24, and is then reflected by the reflective surfaces (reflective surface 22b, reflective surface 23b, and reflective surface 24b) so that the angle with the optical axis B increases.

[0059] As can be seen from Figure 4B, the angle at which the light emitted from the first light-emitting part 10A points toward each convex part (for example, the second convex part 22 to the sixth convex part 26) is approximately the same regardless of which part of the light-emitting surface of the first light-emitting part 10A the light is emitted from. For example, in an end-face view, the angle θ1 at which the light from one end of the first light-emitting part 10A points toward an arbitrary point (in other words, position) of the sixth convex part 26 is approximately the same as the angle θ2 at which the light from the other end of the first light-emitting part 10A points toward an arbitrary point of the sixth convex part 26. Also, the angle at which the light from the central region of the first light-emitting part 10A (in other words, the region other than one end and the other end of the first light-emitting part 10A) points toward an arbitrary point of the sixth convex part 26 is approximately the same as angles θ1 and θ2. Angle θ1 and angle θ2 refer to the angle between the light-emitting surface of the first light-emitting part 10A and the light rays emitted from the first light-emitting part 10A.

[0060] Therefore, regardless of which region of the light-emitting surface of the first light-emitting section 10A the light is emitted from, the angle between the light reflected by the reflective surface 26b of the sixth protrusion 26 and the optical axis B of the lens 20 can be controlled to approach a desired angle. Similarly, as the light emitted from the first light-emitting section 10A moves from the second protrusion 22 to the fifth protrusion 25, the angle between the light reflected by the reflective surface of each protrusion and the optical axis B of the lens 20 can be easily controlled to approach a desired angle. In other words, since all the light emitted from the light-emitting surface of the first light-emitting section 10A can be approximated as a path of light L1, a large amount of light can be controlled as intended. If the intended light distribution is an ultra-wide-angle distribution, the light distribution will approach an ultra-wide-angle distribution.

[0061] This desired angle (the angle that increases the angle between the light reflected by the reflective surfaces of each protrusion and the optical axis B of the lens 20) can be adjusted by changing the shape, size, and / or position of each protrusion of the lens 20. For example, by relatively reducing the angle between the optical axis B of the lens 20 and each reflective surface (22b, 23b, 24b, 25b, 26b) of each protrusion, the light distribution of the light emitted from the lens 20 can be controlled to an ultra-wide-angle distribution.

[0062] In this way, by changing (i.e., controlling) the light distribution of the light emitted from the first light-emitting unit 10A via each of the convex parts of the lens 20, for example, the second convex part 22 to the sixth convex part 26, the range illuminated by the lens 20 (which can also be called the illuminance distribution) can be expanded, and the light from the first light-emitting unit 10A can be made to have an ultra-wide-angle distribution.

[0063] Next, we will explain the fifth case in detail, referring to Figures 4E and 4F. Note that the matters described below are not limited to the fifth case but can also be applied to the fourth case.

[0064] Wide-angle light distribution control In one example, as shown in Figure 4E, in the fifth case, light from the second light-emitting section 10B may be incident from, for example, the incident surfaces (incident surface 25a and incident surface 26a) of the fifth convex section 25 and the sixth convex section 26, and then the incident light may be reflected by the respective reflective surfaces (reflective surface 25b and reflective surface 26b) such that the angle with the optical axis B becomes small. Alternatively, the light incident from the second light-emitting section 10B may be refracted away from the optical axis B without being reflected by the respective reflective surfaces (reflective surface 25b and reflective surface 26b), and exit from the exit surface 20b of the lens 20. Similarly, in the fourth case, the light emitted from the second light-emitting section 10B may be incident on the incident surfaces (incident surface 22a, incident surface 23a, and incident surface 24a) of the second protrusion 22, third protrusion 23, and fourth protrusion 24, for example, and then the incident light may be reflected by each reflective surface (reflective surface 22b, reflective surface 23b, and reflective surface 24b) such that the angle with the optical axis B becomes small. Alternatively, the light incident from the second light-emitting section 10B may be refracted away from the optical axis B without being reflected by each reflective surface (reflective surface 22b, reflective surface 23b, and reflective surface 24b), and exit from the exit surface 20b of the lens 20.

[0065] As can be seen from Figure 4E, the angle at which the light emitted from the second light-emitting unit 10B points to any point on each protrusion (for example, the second protrusion 22 to the sixth protrusion 26) differs depending on the position of the second light-emitting unit 10B relative to each protrusion. For example, in an end-face view, the angle θ3 of the light from the second light-emitting unit 10B located on one side of the first light-emitting unit 10A, near any point on the sixth protrusion 26, pointing to that point is different from the angle θ4 of the light from the second light-emitting unit 10B located on the other side of the first light-emitting unit 10A, farther away from any point on the sixth protrusion 26, pointing to that point. More specifically, the difference between angle θ3 and angle θ4 is greater than the difference between angle θ1 and angle θ2. Angle θ3 and angle θ4 refer to the angle formed between the light-emitting surface of the second light-emitting unit 10B and the light rays emitted from the second light-emitting unit 10B.

[0066] Therefore, due to differences in the position of the second light-emitting part 10B relative to any point on the sixth protrusion 26, the angle of the light rays directed toward any point on the sixth protrusion 26 differs, resulting in variations in the angle between the light reflected by the reflective surface 26b of the sixth protrusion 26 and the optical axis B of the lens 20. Similarly, even when the light emitted from the second light-emitting part 10B is directed, for example, from the second protrusion 22 to the fifth protrusion 25, variations occur in the angle between the light reflected by each reflective surface of each protrusion and the optical axis B of the lens 20. As a result, the proportion of light emitted from the second light-emitting part 10B and controllable via each protrusion of the lens 20, for example, the second protrusion 22 to the sixth protrusion 26, is less than the proportion of light emitted from the first light-emitting part 10A and controllable. In other words, the path of the light L2 emitted from the light-emitting surface of the second light-emitting part 10B is far from the path of the light L1 emitted from the first light-emitting part 10A, resulting in less light that can be controlled as intended. If the intended beam pattern is an ultra-wide beam pattern, it is difficult to control it to be ultra-wide beam, and it approaches a Lambertian beam pattern, resulting in a wide beam pattern. Therefore, the second light-emitting unit 10B can be used for wide beam pattern control.

[0067] Furthermore, to increase the angle between the light reflected from each reflective surface of each protrusion and the optical axis B, adjustments can be made by changing the shape, size, and / or position of each protrusion of the lens 20. For example, wide-angle light distribution can be controlled by relatively reducing the angle between the optical axis B of the lens 20 and the reflective surfaces of each protrusion (for example, to 10 degrees or more and 30 degrees or less).

[0068] Ultra-narrow beam distribution control In another example, as shown in Figure 4C, in the third case, the light emitted from the first light-emitting section 10A is incident from, for example, the incident surface 25a of the fifth protrusion and the incident surface 26a of the sixth protrusion 26, and is then reflected by the reflective surface 25b of the fifth protrusion and the reflective surface 26b of the sixth protrusion 26 in such a way that the angle it makes with the optical axis B of the lens 20 becomes smaller. Similarly in the second case, the light emitted from the first light-emitting section 10A is incident from, for example, the incident surfaces (incident surface 22a, incident surface 23a, and incident surface 24a) of the second protrusion 22, the third protrusion 23, and the fourth protrusion 24, and is then reflected by the reflective surfaces (reflective surface 22b, reflective surface 23b, and reflective surface 24b) in such a way that the angle it makes with the optical axis B of the lens 20 becomes smaller.

[0069] As can be seen from Figure 4C, the angle at which the light emitted from the first light-emitting section 10A points toward each protrusion (for example, the second protrusion 22 to the sixth protrusion 26) is approximately the same regardless of which region of the light-emitting surface of the first light-emitting section 10A the light is emitted from. For example, in an end-face view, the angle θ1 at which light from one end of the first light-emitting section 10A points toward any sixth protrusion 26 is approximately the same as the angle θ2 at which light from the other end of the first light-emitting section 10A points toward the same sixth protrusion 26. Furthermore, the angle at which light from the central region of the first light-emitting section 10A (in other words, the region other than one end and the other end of the first light-emitting section 10A) points toward the sixth protrusion 26 is also approximately the same as angles θ1 and θ2.

[0070] Therefore, regardless of which region of the light-emitting surface of the first light-emitting section 10A the light is emitted from, the angle between the light reflected from the reflective surface 26b of the sixth protrusion 26 and the optical axis B of the lens 20 can be controlled to approach a desired angle. Similarly, even when the light emitted from the first light-emitting section 10A travels from, for example, the second protrusion 22 to the fifth protrusion 25, the angle between the light reflected from the reflective surface of each protrusion and the optical axis B of the lens 20 can be controlled to approach a desired angle. In other words, since all the light emitted from the light-emitting surface of the first light-emitting section 10A can be approximated as a path of light L1, many types of light can be controlled as intended. If the intended light distribution is an ultra-wide-angle distribution, the light distribution will approach an ultra-wide-angle distribution.

[0071] This desired angle (the angle that makes the angle between the optical axis of the light reflected by the reflective surface of each protrusion and the optical axis B of the lens 20 smaller) can be adjusted, for example, by changing the shape, size, and / or position of each protrusion of the lens 20.

[0072] In this way, by changing (i.e., controlling) the light distribution of the light emitted from the first light-emitting unit 10A via each of the protrusions of the lens 20, for example, the second protrusion 22 to the sixth protrusion 26, the range illuminated by the lens 20 (which can also be called the illuminance distribution) can be made narrower, and the light from the first light-emitting unit 10A can be made to have an ultra-narrow beam distribution.

[0073] Narrow beam angle control In another example, as shown in Figure 4F, in the fifth case, light from the second light-emitting section 10B may be incident from, for example, the incident surfaces (incident surface 25a and incident surface 26a) of the fifth convex section 25 and the sixth convex section 26, and then the incident light may be reflected by the respective reflective surfaces (reflective surface 25b and reflective surface 26b) such that the angle with the optical axis B becomes larger. Alternatively, the light incident from the second light-emitting section 10B may be refracted away from the optical axis B without being reflected by the respective reflective surfaces (reflective surface 25b and reflective surface 26b), and exit from the exit surface 20b of the lens 20. Similarly, in the fourth case, the light emitted from the second light-emitting section 10B may be incident on the incident surfaces (incident surface 22a, incident surface 23a, and incident surface 24a) of the second protrusion 22, third protrusion 23, and fourth protrusion 24, for example, and then the incident light may be reflected by each reflective surface (reflective surface 22b, reflective surface 23b, and reflective surface 24b) such that the angle with the optical axis B becomes large. Alternatively, the light incident from the second light-emitting section 10B may be refracted away from the optical axis B without being reflected by each reflective surface (reflective surface 22b, reflective surface 23b, and reflective surface 24b), and exit from the exit surface 20b of the lens 20.

[0074] As can be seen from Figure 4F, the angle at which the light emitted from the second light-emitting unit 10B points toward each convex portion (for example, the second convex portion 22 to the sixth convex portion 26) differs depending on the position of the second light-emitting unit 10B relative to each convex portion. For example, in an end-face view, the angle θ3 at which the light from the second light-emitting unit 10B located on one side of the first light-emitting unit 10A, near any sixth convex portion 26, points toward the sixth convex portion 26 is different from the angle θ4 at which the light from the second light-emitting unit 10B located on the other side of the first light-emitting unit 10A, farther away from the sixth convex portion 26, points toward the sixth convex portion 26. More specifically, the difference between angle θ3 and angle θ4 is greater than the difference between angle θ1 and angle θ2.

[0075] Therefore, due to differences in the position of the second light-emitting unit 10B relative to any sixth protrusion 26, the angle toward the sixth protrusion 26 differs, resulting in variations in the angle between the light reflected by the reflective surface 26b of the sixth protrusion 26 and the optical axis B. Similarly, even when the light emitted from the second light-emitting unit 10B is directed, for example, from the second protrusion 22 to the fifth protrusion 25, variations occur in the angle between the light reflected by each reflective surface of each protrusion and the optical axis B. As a result, the proportion of light emitted from the second light-emitting unit 10B and controllable via each protrusion of the lens 20, for example, the second protrusion 22 to the sixth protrusion 26, is less than the proportion of light emitted from the first light-emitting unit 10A and controllable. In other words, the path of the light L2 emitted from the light-emitting surface of the second light-emitting unit 10B is far from the path of the light L1 emitted from the first light-emitting unit 10A, resulting in less light that can be controlled as intended. If the intended beam pattern is an extremely narrow beam pattern, it becomes difficult to control it to that extreme, and it approaches a Lambertian beam pattern, resulting in a narrow beam pattern. Therefore, the second light-emitting unit 10B can be used for narrow beam pattern control.

[0076] Furthermore, the angle between the light reflected by each reflective surface of each protrusion and the optical axis B can be reduced by changing the shape, size, and / or position of each protrusion of the lens 20. For example, a narrow-angle light distribution can be controlled by relatively increasing the angle between the optical axis B of the lens 20 and the reflective surface of each protrusion compared to a wide-angle light distribution (for example, to 35 degrees or more and 50 degrees or less).

[0077] From the above, the light emitted from the first light-emitting part 10A located in the center of the light-emitting part assembly 10 can be controlled by the lens 20 to a greater extent than the light emitted from the second light-emitting part 10B which is spaced apart along the outer circumference of the first light-emitting part 10A. Therefore, the light from the first light-emitting part 10A can be adjusted to an ultra-wide-angle or ultra-narrow-angle distribution. On the other hand, the light emitted from the second light-emitting part 10B which is spaced apart along the outer circumference of the first light-emitting part 10A can be controlled by the lens 20 to a less extent than the light emitted from the first light-emitting part 10A. Therefore, the light from the second light-emitting part 10B can be adjusted to a wide-angle or narrow-angle distribution.

[0078] Thus, because the position of the first light-emitting part 10A relative to the lens 20 allows for easy control of the light, the light distribution of the first light-emitting part 10A can be significantly altered by the lens 20. In other words, the direction of propagation of many of the light beams emitted from the first light-emitting part 10A can be greatly changed by the lens 20. In contrast, because the position of the second light-emitting part 10B relative to the lens 20 makes it difficult to control the light, the light distribution of the second light-emitting part 10B does not change significantly by the lens 20. In other words, it is difficult to significantly alter the direction of propagation of the light beams emitted from the second light-emitting part 10B by the lens 20. Therefore, the light distribution angle of the light emitted from the first light-emitting part 10A changes more significantly with the lens 20 than the light distribution angle of the light emitted from the second light-emitting part 10B. In the light source device 100 of Embodiment 1, by utilizing relatively different light distributions such as the light distribution using the first light-emitting part 10A with the lens 20 and the light distribution using the second light-emitting part 10B with the lens 20, it is possible to control light distribution in four patterns, including ultra-wide-angle light distribution, wide-angle light distribution, ultra-narrow-angle light distribution, and narrow-angle light distribution. Specifically, by making the amount of light emitted from the first light-emitting part 10A whose direction of propagation has changed relatively larger than the amount of light emitted from the second light-emitting part 10B whose direction of propagation has changed due to differences in the position and shape of each light-emitting part and differences in the shape, size and / or position of each convex part of the lens 20, it is possible to control two or more patterns of light distribution with a single lens 20 (a single Fresnel lens). More specifically, controlling the light distribution in two or more patterns means adjusting the output ratio of the first light-emitting unit 10A and the second light-emitting unit 10B, for example by simultaneously making one stronger and the other weaker, to control the light distribution to be between two patterns (for example, ultra-wide-angle distribution and wide-angle distribution, or ultra-narrow-angle distribution and narrow-angle distribution).

[0079] Furthermore, it is preferable that the light from the first light-emitting section 10A and the second light-emitting section 10B is emitted so as to spread away from the optical axis B of the lens 20, then refracted by the lens 20 and proceeds toward the optical axis B of the lens 20. Specifically, it is preferable that the outermost convex part with respect to the optical axis B and other convex parts adjacent to it (corresponding to the fifth convex part 25 in the above description) are positioned outside the outer edge of the light-emitting section assembly 10 in a plan view, so that the light from the first light-emitting section 10A and the second light-emitting section 10B can be incident on each convex part of the lens 20 (particular attention should be paid to the outermost convex part (corresponding to the sixth convex part 26 in the above description)) with respect to the optical axis B of the lens 20.

[0080] [Embodiment 2] Figure 5A is a schematic plan view showing the configuration of the light source device of Embodiment 2. Figure 5B is an end view of line segment BB in Figure 5A, schematically showing how the light distribution of the first and third light-emitting parts of the light-emitting unit assembly corresponding to each of the two Fresnel lenses is controlled by the lenses. Figure 5C is an end view of line segment BB in Figure 5A, schematically showing how the light distribution of the second and fourth light-emitting parts of the light-emitting unit assembly corresponding to each of the two Fresnel lenses is controlled by the lenses.

[0081] The following describes the light source device 100α of Embodiment 2. Regarding Embodiment 2, we will primarily describe the differences from Embodiment 1, and will omit or simplify explanations of aspects that overlap with Embodiment 1.

[0082] The light source device 100α of Embodiment 2 basically reflects the concept of the light source device 100 of Embodiment 1, in which, in a plan view, a light-emitting assembly 10 (hereinafter referred to as the first light-emitting assembly 10I) is arranged within the area of ​​one Fresnel lens (hereinafter referred to as the first Fresnel lens 20I) as the lens 20. However, it differs from Embodiment 1 only in that, in addition to the first light-emitting assembly 10I and the first Fresnel lens 20I, it further uses a second light-emitting assembly 10II and a second lens 20II (hereinafter referred to as the second Fresnel lens 20II).

[0083] The light source device 100α of Embodiment 2 includes a compound eye lens 200 (hereinafter referred to as lens 200) having a first Fresnel lens 20I and a second Fresnel lens 20II, a first light-emitting unit assembly 10I corresponding to the first Fresnel lens 20I, and a second light-emitting unit assembly 10II corresponding to the second Fresnel lens 20II. The first light-emitting unit assembly 10I includes a first light-emitting unit 10AI and a second light-emitting unit 10BI provided spaced apart along the outer circumference of the first light-emitting unit 10AI. The first Fresnel lens 20I is arranged on the first light-emitting unit assembly 10I so as to straddle the first light-emitting unit 10AI and the second light-emitting unit 10BI. In other words, in a plan view, the first light-emitting section 10AI and the second light-emitting section 10BI (corresponding to the first light-emitting section assembly 10I) are arranged within the region of the first Fresnel lens 20I, and the center of the first light-emitting section 10AI is approximately concentric (in other words, the optical axis C) of the first Fresnel lens 20I.

[0084] The first light emitted from the first light-emitting section 10AI and the second light-emitting section 10BI, respectively, is controlled by the first Fresnel lens 20I. The second light-emitting section assembly 10II comprises a third light-emitting section 10AII and a fourth light-emitting section 10BII, which is spaced apart along the outer circumference of the third light-emitting section 10AII. The second Fresnel lens 20II is positioned on the second light-emitting section assembly 10II so as to straddle the third light-emitting section 10AII and the fourth light-emitting section 10BII. In other words, in a plan view, the third light-emitting section 10AII and the fourth light-emitting section 10BII (corresponding to the second light-emitting section assembly 10II) are positioned within the region of the second Fresnel lens 20II, and the concentricity (in other words, the optical axis D) of the second Fresnel lens 20II and the center of the third light-emitting section 10AII are approximately coincident.

[0085] The second light emitted from the third light-emitting section 10AII and the fourth light-emitting section 10BII is then controlled by the second Fresnel lens 20II. The third light-emitting section 10AII and the fourth light-emitting section 10BII each emit second light of substantially the same color. The color of the second light is different from the color of the first light. In this embodiment, substantially the same color means that the color difference (corresponding to the difference in chromaticity) Δu'v' of the light emitted from each light-emitting section (here, the third light-emitting section and the fourth light-emitting section) is 0.05 or less.

[0086] The second light-emitting assembly 10II may emit a second light whose color is different from the first light emitted by the first light-emitting assembly 10I. In this embodiment, the second light whose color is different from the first light means a second light whose color difference (corresponding to the difference in chromaticity) Δu'v' between the first light and the second light is greater than 0.05.

[0087] The following description will use as an example the case in the light source device 100α of Embodiment 2, where the first light-emitting assembly 10I includes wavelength conversion member 11AI and wavelength conversion member 11BI as its components, and the second light-emitting assembly 10II includes wavelength conversion member 11AII and wavelength conversion member 11BII as its components. In this case, the wavelength conversion member 11AII and wavelength conversion member 11BII of the second light-emitting assembly 10II may contain only one of the above-mentioned wavelength conversion members, or may contain multiple types of wavelength conversion members. The wavelength conversion members 11AI and 11BI of the first light-emitting assembly 10I may be selected from wavelength conversion members 11AII and wavelength conversion member 11BII, or the content of the wavelength conversion members may be different.

[0088] The light source device 100α of Embodiment 2, like the light source device 100 of Embodiment 1, can control the light distribution of the first light emitted from the first light-emitting unit 10AI and the second light-emitting unit 10BI constituting the first light-emitting unit combination 10I using the first Fresnel lens 20I. As a result, the first Fresnel lens 20I enables the first light to have two or more light distribution patterns.

[0089] Furthermore, in Embodiment 2, the second Fresnel lens 20II makes it possible to control the light distribution of the second light emitted from the third light-emitting unit 10AII and the fourth light-emitting unit 10BII, which constitute the second light-emitting unit assembly 10II. As a result, the second Fresnel lens 20II enables two or more patterns of light distribution for the second light, similar to the first light.

[0090] From the above, the light source device 100α of Embodiment 2 is capable of four or more light distribution patterns due to the "first Fresnel lens 20I and the second Fresnel lens 20II" and the "first light-emitting unit assembly 10I located within the region of the first Fresnel lens 20I and the second light-emitting unit assembly 10II located within the region of the second Fresnel lens 20II in a plan view". In other words, the lens 200 having two Fresnel lenses can control the first light and the second light to a total of four or more light distribution patterns. Therefore, the light source device 100α can be miniaturized and can be suitably used in smartphones. Furthermore, if the two Fresnel lenses 20I and 20II have the same shape, the appearance of the lens 200 will be improved (see Figure 5A).

[0091] Furthermore, similar to Embodiment 1, if the first light-emitting unit 10AI and the third light-emitting unit 10AII, both having independently controllable first light-emitting elements, are controlled to light up in either the first light-emitting unit assembly 10I or the second light-emitting unit assembly 10II, the following effects are achieved.

[0092] Specifically, similar to Embodiment 1, the difference in angle between the light emitted from the light-emitting surfaces of the first light-emitting section 10AI and the third light-emitting section 10AII and the light directed toward any sixth convex portion 26 of the first Fresnel lens 20I and the second Fresnel lens 20II, and the light-emitting surfaces of the first light-emitting section 10AI and the third light-emitting section 10AII is small. Therefore, the angle between the optical axis of the light reflected by the reflective surfaces of the sixth convex portion 26 and the fifth convex portion 25, which are located far from the first light-emitting section 10AI and the third light-emitting section 10AII, and the optical axis C of the first Fresnel lens 20I or the optical axis D of the second Fresnel lens 20II (hereinafter referred to as the optical axes C and D of the lens 200) can be controlled to approach a desired angle. This desired angle (the angle at which the angle between the optical axis of the light reflected by the reflective surfaces of each convex portion and the optical axes C and D of the lens 200 becomes larger or smaller) can be adjusted, for example, by changing the shape, size, and / or position of each convex portion of the Fresnel lens.

[0093] As a result, the light emitted from the first light-emitting unit 10AI and the third light-emitting unit 10AII can be controlled to a desired light distribution through the protrusions of the first Fresnel lens 20I and the second Fresnel lens 20II, such as the fifth protrusion 25 and the sixth protrusion 26, which are located far from each light-emitting unit. Therefore, a single lens 200 having Fresnel lenses 20I and 20II can broaden or narrow the illuminated area (which can also be called the illuminance distribution), and the first light-emitting unit 10AI and the third light-emitting unit 10AII can be used for ultra-wide-angle light distribution control or ultra-narrow-angle light distribution control.

[0094] Furthermore, as in Embodiment 1, if the second light-emitting unit 10BI and the fourth light-emitting unit 10BII are controlled to light up in both the first light-emitting unit assembly 10I and the second light-emitting unit assembly 10II, the following effects are achieved.

[0095] Specifically, similar to Embodiment 1, in each light-emitting unit combination 10I and 10II, due to the positional relationship between the second light-emitting unit 10BI and the sixth protrusion 26 of the lens 20I, and the positional relationship between the fourth light-emitting unit 10BII and the sixth protrusion 26 of the lens 20II, the angle between the light ray directed to an arbitrary point on the sixth protrusion 26 and the light-emitting surface of the second light-emitting unit is different (meaning the angles θ3 and θ4 mentioned above). As a result, the angle between the light reflected from the reflective surface of the sixth protrusion 26 and the optical axes C and D of the lens 200 becomes larger or smaller than the target angle. Similarly, even when the light emitted from the second light-emitting unit 10BI and the fourth light-emitting unit 10BII is directed, for example, from the second protrusion 22 to the fifth protrusion 25, the angle between the light reflected from the reflective surface of each protrusion and the optical axes C and D of the lens 20 becomes larger or smaller than the desired angle. As a result, the proportion of light emitted and controllable from the second light-emitting unit 10BI and the fourth light-emitting unit 10BII via each of the convex portions of the first Fresnel lens 20I and the second Fresnel lens 20II, for example, the second convex portion 22 to the sixth convex portion 26, is less than the proportion of light emitted and controllable from the first light-emitting unit 10AI and the third light-emitting unit 10AII. Therefore, the second light-emitting unit 10BI and the fourth light-emitting unit 10BII can be used for wide-angle or narrow-angle light distribution control.

[0096] From the above, according to the light source device 100α of Embodiment 2, a single first Fresnel lens 20I can perform wide-angle and ultra-wide-angle light distribution control or narrow-angle and ultra-narrow-angle light distribution control of the first light, depending on the differences in the positional relationship between the two light-emitting units (for example, the first light-emitting unit 10AI and the second light-emitting unit 10BI) and the first Fresnel lens 20I. Furthermore, a single second Fresnel lens 20II can perform wide-angle and ultra-wide-angle light distribution control or narrow-angle and ultra-narrow-angle light distribution control of the second light, depending on the differences in the positional relationship between the two light-emitting units (for example, the third light-emitting unit 10AII and the fourth light-emitting unit 10BII) and the second Fresnel lens 20II.

[0097] In other words, in Embodiment 2, a single compound eye lens having two Fresnel lenses can control a total of four or more light distribution patterns from the first light emitted from the two light-emitting parts constituting the first light-emitting unit combination 10I and the second light emitted from the two light-emitting parts constituting the second light-emitting unit combination 10II.

[0098] <Manufacturing method for light source devices> The following describes the method for manufacturing a light source device according to an embodiment of the present invention.

[0099] A method for manufacturing a light source device according to an embodiment of the present invention includes a first step of providing a light-emitting unit assembly on a substrate having wiring (hereinafter referred to as a wiring substrate), and a second step of providing a lens on the light-emitting unit assembly so as to straddle the first light-emitting unit and the second light-emitting unit of the light-emitting unit assembly.

[0100] Specifically, in the first step, the wiring of the wiring board and a pair of electrodes provided on each light-emitting element of each light-emitting element of the light-emitting element assembly are arranged on the wiring board so that they face each other and each light-emitting element can be independently controlled to light up. In the second step, a lens is provided on the light-emitting element assembly so that each light-emitting element and a plurality of convex portions of the Fresnel lens are spaced apart and face each other. By doing so, a light source device according to an embodiment of the present invention can be manufactured.

[0101] The following describes the manufacturing process for the light-emitting assembly, which is a component of the light source device. Three examples of manufacturing processes for the light-emitting assembly are shown below (see Figures 6A-6O, 7A-M, and 8A-8R). In the drawings, a configuration is shown in which multiple second light-emitting elements are spaced apart from each other, surrounding the first light-emitting element. However, the configuration is not limited to this, and a second light-emitting element having one second light-emitting element may be arranged to surround the first light-emitting element.

[0102] Example 1 of fabrication of a light-emitting assembly: First, a wavelength conversion member sheet 111α is prepared (see Figures 6A and 6B). The wavelength conversion member sheet 111α is divided into multiple rectangular (or square) wavelength conversion member sheets 11α by dicing (see Figures 6C and 6D). Next, the first light-emitting element 12Aα and the second light-emitting element 12Bα are placed on each of the multiple rectangular wavelength conversion member sheets 11α such that the light-emitting surface of the first light-emitting element 12Aα and the light-emitting surface of the second light-emitting element 12Bα face each other (see Figures 6E and 6F). After placing the first light-emitting element 12Aα and the second light-emitting element 12Bα, the sides and electrodes of all the light-emitting elements are covered with reflective member material 13α (see Figures 6G and 6H). After the reflective member material 13α is cured, the reflective member material 13α is ground so that a pair of electrodes 41α and 42α placed on each light-emitting element are exposed. Finally, the reflective material 13α is diced into individual pieces to obtain the desired shape (see Figures 6K and 6L). This completes the fabrication of the light-emitting assembly 10, which includes the first light-emitting section 10A and the second light-emitting section 10B (see Figures 6M to 6O).

[0103] Example 2 of fabricating a light-emitting assembly: First, an assembly plate 60α of the first light-emitting element 12Aα and the second light-emitting element 12Bα, whose sides are covered with reflective material 13α, is prepared (see Figures 7A and 7B). Next, a phosphor-containing block 11Aα, which is a wavelength conversion member, is placed facing the light-emitting surface of the first light-emitting element 12Aα, and a phosphor-containing block 11Bα, which is a wavelength conversion member, is placed facing the light-emitting surface of the second light-emitting element 12Bα (see Figures 7C and 7D). After placing the phosphor-containing blocks, the sides and top surfaces of the phosphor-containing blocks are covered with reflective material 13β (see Figures 7E and 7F). After the reflective material 13β has hardened, the reflective material 13β is ground so that the top surfaces of the phosphor-containing blocks 11Aα and 11Bα are exposed (see Figures 7G and 7H). Finally, the reflective material 13α and 13β are diced into individual pieces to obtain the desired shape (see Figures 7I and 7J). As described above, a light-emitting unit assembly 10 comprising a first light-emitting unit 10A and a second light-emitting unit 10B can be manufactured (see Figures 7K to 7M).

[0104] Example 3 of fabrication of a light-emitting assembly: First, prepare the reflective member plate 13γ (see Figures 8A and 8B). After preparing the reflective member plate 13γ, punch out a portion of the reflective member plate 13γ so that a through hole S1 is formed (see Figures 8C and 8D). After punching, fill the formed through hole S1 with phosphor-containing resin material 11Bβ, for example, by potting (see Figures 8E and 8F). After the phosphor-containing resin material 11Bβ has hardened, punch out a portion of the phosphor-containing resin material 11Bβ so that a through hole S2 is formed (see Figures 8G and 8H). After punching, fill the formed through hole S2 with reflective member material 13β (see Figures 8I and 8J). After the reflective member material 13β has hardened, punch out a portion of the reflective member material 13β so that a through hole S3 is formed (see Figures 8K and 8L). After punching, the formed through-hole S3 is filled with phosphor-containing resin material 11Aβ and cured (see Figures 8M and 8N). Then, the assembly plate 60α of the first light-emitting element 12Aα and the second light-emitting element 12Bα, whose sides are covered with reflective material 13α, is positioned so that the cured portion of phosphor-containing resin material 11Aβ and the cured portion of phosphor-containing resin material 11Bβ are directly opposite each other (see Figures 8O and 8P). Finally, the reflective material 13α and the reflective plate 13γ are cut by dicing to obtain the desired shape (see Figures 8Q and 8R). As a result, a light-emitting element assembly comprising the first light-emitting element 10A and the second light-emitting element 10B can be manufactured.

[0105] Although one embodiment of the present invention has been described above, this merely illustrates a typical example within the scope of application of the present invention. Therefore, the present invention is not limited thereto, and various modifications are possible without departing from the scope and spirit of this disclosure. [Industrial applicability]

[0106] The light source device of the embodiment can be suitably used for lighting, camera flashes, vehicle headlights, and the like. However, the light source device of the embodiment is not limited to these applications. [Explanation of Symbols]

[0107] 200 lenses 111α Wavelength Conversion Material Sheet 100, 100α light source device 60α Reflective material is used to cover the sides of an assembly plate of light-emitting elements (in the process of fabricating the light-emitting assembly). 50 areas 40 A pair of electrodes 41 Positive electrode 42 Negative electrode 30 circuit boards 20 Fresnel lens 20a Incident plane of the Fresnel lens 20b Outlet surface of Fresnel lens 20I First Fresnel Lens 20II Second Fresnel Lens 21 First protrusion 21a Convex curved surface of the first protrusion 21b Micro-protrusion member of the first protrusion 22 Second protrusion 22a Incident surface of the second protrusion 22b Reflecting surface of the third protrusion 23 Third protrusion 23a Incident surface of the third protrusion 23b Reflecting surface of the third protrusion 24. Fourth protrusion 24a Incident surface of the fourth protrusion 24b Reflecting surface of the fourth protrusion 25. Fifth protrusion 25a Incident surface of the fifth protrusion 25b Reflecting surface of the fifth protrusion 26. Sixth protrusion 26a Incident surface of the sixth protrusion 26b Reflecting surface of the sixth protrusion 10. Light-emitting unit assembly 10I First light-emitting assembly 10II Second light-emitting unit assembly 10A, 10AI, 10AX, 10AY First light-emitting section 10B, 10BI, 10BX, 10BY Second light-emitting section 10AII Third light-emitting section 10BII 4th ​​light-emitting section 11A, 11AI, 11AX, 11AY Wavelength conversion member of the first light-emitting section 11B, 11BI, 11BX, 11BY Wavelength conversion member of the second light-emitting section 11AII Wavelength conversion member of the third light-emitting section 11BII Wavelength conversion member of the fourth light-emitting section 11Aα, 11Bα phosphor-containing blocks 11Aβ, 11Bβ phosphor-containing resin material 12A, 12AI, 12AX, 12AY: Light-emitting element of the first light-emitting section (first light-emitting element) 12B, 12BI, 12BX, 12BY Second light-emitting element (second light-emitting element) 12AII Third light-emitting element (third light-emitting element) 12BII Light-emitting element of the fourth light-emitting section (fourth light-emitting element) 12Aα, 12Bα Light-emitting element (in the process of fabricating the light-emitting assembly) 13 Reflective material 13α, 13β Reflective material 13γ Reflective plate L1 Light from the first light-emitting part L2 Light from the second light-emitting part Optical axis of lenses B, C, and D S1, S2, S3 through holes

Claims

1. A light-emitting unit assembly comprising a first light-emitting unit having a first light-emitting element, and a second light-emitting unit having a plurality of second light-emitting elements, wherein in a plan view, the second light-emitting units surround the first light-emitting unit, The assembly comprises a lens arranged on the aforementioned light-emitting unit, The first light-emitting unit and the second light-emitting unit can each be controlled to light up independently. The optical axis of the lens overlaps with the first light-emitting part. The rate of change in the light distribution angle of the first light-emitting portion due to the lens is greater than the rate of change in the light distribution angle of the second light-emitting portion due to the lens. A light source device wherein the light distribution of the light emitted from the lens includes two or more light distribution patterns from among ultra-wide-angle distribution, wide-angle distribution, ultra-narrow-angle distribution, and narrow-angle distribution.

2. The light source device according to claim 1, wherein the light distribution pattern can be controlled by adjusting the output ratio of the first light-emitting unit and the second light-emitting unit.

3. The light source device according to claim 1 or 2, wherein the first light-emitting element and a plurality of the second light-emitting elements are arranged in a matrix, and the plurality of the second light-emitting elements are arranged adjacent to each other.

4. The second light-emitting element has a wavelength conversion member on the light-emitting surface side, The light source device according to any one of claims 1 to 3, wherein the wavelength conversion member is arranged to surround the outer periphery of the first light-emitting portion.

5. The second light-emitting element has a wavelength conversion member on the light-emitting surface side, The light source device according to any one of claims 1 to 4, wherein one of the wavelength conversion members is arranged to surround the outer periphery of the first light-emitting portion.

6. The light source device according to any one of claims 1 to 5, wherein, in a plan view, the light-emitting assembly is arranged within the area of ​​the lens.

7. The light source device according to any one of claims 1 to 6, wherein the light from the first light-emitting unit and the second light-emitting unit has a color difference Δu'v' of 0.05 or less in the CIE 1976 (L*, u*, v*) color space.

8. The light source device according to any one of claims 1 to 7, wherein the lens is a Fresnel lens.

9. The light-emitting assembly has reflective members on each side surface of the first light-emitting element and the plurality of second light-emitting elements, according to any one of claims 1 to 8.

10. The light source device according to any one of claims 1 to 9 is a light source device that is a flash light source.

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