Light source device

Abstract

The present invention provides a light source device that can illuminate a desired irradiation area with sufficient light intensity. [Solution] A light source device for irradiating light to two or more irradiation areas, comprising: a plurality of light-emitting units having a light-emitting surface on its upper surface, emitting light from the light-emitting surface at a first half-width angle, and capable of being individually lit; a first lens covering the light-emitting surfaces of the plurality of light-emitting units; and an optical lens located above the light-emitting surface of the light-emitting units, having a first surface located on the light-emitting surface side of the light-emitting unit and including a plurality of incident regions into which the light emitted from the light-emitting unit is incident, and a second surface located on the opposite side of the first surface and including a plurality of emission regions corresponding to each of the plurality of incident regions, wherein the shortest distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 1.0 mm or less, and the light emitted from each of the light-emitting units is incident on the optical lens via the first lens and is emitted from the first lens at a second half-width angle smaller than the first half-width angle.

Description

Technical Field

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

Background Art

[0002] In recent years, light sources using a plurality of light emitting parts such as light emitting diodes have been widely used. For example, Patent Document 1 discloses a light source that can be used for a flash of a small camera such as a camera mounted on a mobile phone.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For such a light source used for, for example, a camera flash, it is required to irradiate a desired irradiation area with a sufficient amount of light among the individual irradiation areas obtained by dividing the entire irradiation area.

[0005] Therefore, an object of the present disclosure is to provide a light source device capable of irradiating a desired irradiation area with a sufficient amount of light.

Means for Solving the Problems

[0006] A light source device according to one embodiment of the present disclosure is a light source device for irradiating light to two or more irradiation areas, comprising: a plurality of light-emitting units having a light-emitting surface on its upper surface, emitting light from the light-emitting surface at a first half-width angle, and being individually lit; a first lens covering the light-emitting surfaces of the plurality of light-emitting units; and an optical lens located above the light-emitting surface of the light-emitting units, having a first surface located on the light-emitting surface side of the light-emitting unit and including a plurality of incident regions into which light emitted from the light-emitting unit is incident, and a second surface located on the opposite side of the first surface and including a plurality of emission regions corresponding to each of the plurality of incident regions, wherein the shortest distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 1.0 mm or less, and the light emitted from each of the light-emitting units is incident on the optical lens via the first lens and is emitted from the first lens at a second half-width angle smaller than the first half-width angle.

[0007] Furthermore, a light source device according to one embodiment of the present disclosure is a light source device for irradiating light to two or more irradiation areas, comprising: a plurality of light-emitting units having a light-emitting surface on its upper surface, emitting light from the light-emitting surface at a first half-width angle, and being individually lit; a first lens covering the light-emitting surfaces of the plurality of light-emitting units; and an optical lens having a first surface including a plurality of incident areas and a second surface including a plurality of emission areas, and located above the light-emitting surfaces of the light-emitting units, wherein the shortest distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 1.0 mm or less, and the light emitted from each of the light-emitting units is incident on the optical lens via the first lens and emitted from the first lens at a second half-width angle smaller than the first half-width angle.

[0008] Also, a light source device according to an embodiment of the present disclosure is a light source device for irradiating light onto two or more irradiation regions, having a light emitting surface on an upper surface, emitting light at a first half-value full angle from the light emitting surface, and including a plurality of individually lightable light emitting portions arranged in a matrix, a first lens covering the light emitting surfaces of the plurality of light emitting portions, a first surface including a plurality of incident regions, and a second surface including a plurality of exit regions, and an optical lens positioned above the light emitting surfaces of the light emitting portions. Light emitted from each of the light emitting portions enters the optical lens via the first lens and exits the first lens at a second half-value full angle smaller than the first half-value full angle. The first lens includes a plurality of unit first lenses provided for each of the light emitting portions, and the optical axis of at least one of the unit first lenses is inclined at an angle γ with respect to the optical axis of the optical lens. The angle γ is determined using the shortest distance L (0 < L) from the optical axis of the optical lens to the center of the light emitting surface of the light emitting portion arranged at the corner of the matrix, the shortest distance x (0 < x ≤ L) from the optical axis of the optical lens to the center of the light emitting surface of the light emitting portion covered by the unit first lens provided to be inclined, and the angle α (0° < α < 180°) formed by a straight line connecting the center point, which is the intersection of the plane in which the light emitting surfaces of the plurality of light emitting portions extend and the optical axis of the optical lens, and one of two points located at the diagonal of the region including all the irradiation regions, and a straight line connecting the center point and the other of the two points. It is represented as TIFF202 June 31, 2024, 000002.tif1277.

Effects of the Invention

[0009] The light source device according to an embodiment of the present disclosure can irradiate a desired irradiation region with a sufficient amount of light.

Brief Description of the Drawings

[0010] [Figure 1] It is a perspective view of a flash light source according to Embodiment 1 of the present disclosure. [Figure 2A] It is a top view of the light emitting portion of the flash light source shown in FIG. 1, and is a diagram for explaining the arrangement of the light emitting portions. [Figure 2B]Figure 1 shows a top view of the light-emitting section of a flash light source, where the dimensions of the light-emitting surface differ for each light-emitting section. [Figure 2C] Figure 1 shows a top view of the light-emitting section of a flash light source, where the dimensions of the light-emitting surface differ for each light-emitting section. [Figure 3] This figure illustrates the relationship between the light-emitting part of the flash light source shown in Figure 1 and the illumination area provided in correspondence with the light-emitting part. [Figure 4A] Figure 1 is a cross-sectional view of the flash light source along the AA line. [Figure 4B] This is another cross-sectional view along the AA line in the flash light source shown in Figure 1, where the unit first lens is integrated to form the first lens. [Figure 4C] This is an enlarged view of a portion of the cross-sectional view shown in Figure 4A. [Figure 5] Figure 4A is a magnified cross-sectional view of the light-emitting section and the first lens shown in the cross-sectional view. [Figure 6A] This is an enlarged view of a portion of Figure 4A, showing how light from the central light-emitting part enters the optical lens through the central unit first lens. [Figure 6B] Figure 4A shows a cross-sectional view illustrating how light emitted from the central unit first lens illuminates the corresponding illumination area through an optical lens. [Figure 7A] This is an enlarged view of a portion of Figure 4A, showing how light from the surrounding light-emitting area enters the optical lens through the surrounding unit first lens. [Figure 7B] Figure 4A shows a cross-sectional view illustrating how light emitted from the first peripheral lens illuminates the corresponding illumination area through an optical lens. [Figure 8] This is a cross-sectional view of a flash light source according to Embodiment 2 of this disclosure. [Figure 9] This is a cross-sectional view of a flash light source according to Embodiment 3 of the present disclosure. [Figure 10] This is a cross-sectional view of a flash light source according to Embodiment 4 of this disclosure. [Figure 11]Cross-sectional view of a light source for flash according to Embodiment 5 of the present disclosure. [Figure 12] Cross-sectional view of a light source for flash according to Embodiment 6 of the present disclosure. [Figure 13] Cross-sectional view of the first lens included in the light source for flash according to Embodiment 7 of the present disclosure. [Figure 14] Cross-sectional view of a light source for flash according to Embodiment 8 of the present disclosure. [Figure 15] Cross-sectional view of a light source for flash according to a modified example of the present disclosure. [Figure 16] Cross-sectional view of a light source for flash according to a modified example of the present disclosure. [Figure 17] Cross-sectional view of a light source for flash according to a modified example of the present disclosure. [Figure 18] In the light source for flash according to Embodiment 1 of the present disclosure, it is a diagram showing the lighting state when the light-emitting part in the 3rd row and 1st column is lit. [Figure 19] It is a diagram showing the lighting state when the light-emitting part in the 3rd row and 1st column is lit in a light source having the same configuration as the light source for flash according to Embodiment 1 of the present disclosure, except for not having the first lens. [Figure 20] It is a diagram showing the shortest distance L, the shortest distance x, and the angle α in the light source for flash shown in FIG.

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments and examples for carrying out the invention according to the present disclosure will be described with reference to the drawings. Note that the light source for flash, which is an example of the light source device according to the present disclosure described below, is for embodying the technical idea of the invention according to the present disclosure, and unless otherwise specified, the invention according to the present disclosure is not limited to the following. In each drawing, components with the same function may be denoted by the same reference numeral. For convenience, such as explaining key points or facilitating understanding, components may be shown separately as embodiments or examples, but partial substitution or combination of components shown in different embodiments or examples is possible. In the embodiments and examples described later, descriptions of matters common to those described above will be omitted, and only the differences will be explained. In particular, similar effects and benefits from similar configurations will not be mentioned sequentially in each embodiment or example. The size and positional relationships of components shown in each drawing may be exaggerated to clarify the explanation.

[0012] For example, in a camera flash light source, the larger the number of divisions that separate the entire illumination area into individual illumination areas, the more precisely it becomes possible to distinguish between areas that are illuminated and areas that are not, resulting in a clearer photograph of the subject. However, increasing the number of divisions and subdividing the entire illumination area reduces the size of each individual illumination area, making it difficult to focus the light emitted from each light-emitting part onto the desired illumination area using an optical lens (e.g., a camera lens), and thus difficult to illuminate the desired area with sufficient light intensity. The inventors diligently studied how to solve this problem.

[0013] As a result, the inventors discovered that by using another lens in addition to the optical lens, the light emitted from each light-emitting part narrows its half-width angle (directional half-width angle), giving it directionality, particularly directionality limited to the desired illumination area, before it enters the optical lens, the desired illumination area can be illuminated with sufficient light intensity.

[0014] A light source device according to one embodiment of the present disclosure is based on the above findings and is a light source device for irradiating light to two or more irradiation areas, comprising: a plurality of light-emitting units having a light-emitting surface on its upper surface, emitting light from the light-emitting surface at a first half-width angle, and being individually lit; a first lens covering the light-emitting surfaces of the plurality of light-emitting units; and an optical lens located above the light-emitting surface of the light-emitting units, having a first surface located on the light-emitting surface side of the light-emitting unit and including a plurality of incident regions into which light emitted from the light-emitting unit is incident, and a second surface located on the opposite side of the first surface and including a plurality of emission regions corresponding to each of the plurality of incident regions, wherein the shortest distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 1.0 mm or less, and the light emitted from each of the light-emitting units is incident on the optical lens via the first lens, and light is emitted from the first lens at a second half-width angle smaller than the first half-width angle.

[0015] Furthermore, a light source device according to another embodiment of the present disclosure is based on the above findings and is a light source device for irradiating light to two or more irradiation areas, comprising: a plurality of light-emitting units having a light-emitting surface on its upper surface, emitting light from the light-emitting surface at a first half-width angle, and being individually lit; a first lens covering the light-emitting surfaces of the plurality of light-emitting units; and an optical lens having a first surface including a plurality of incident areas and a second surface including a plurality of emission areas, and located above the light-emitting surfaces of the light-emitting units, wherein the shortest distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 1.0 mm or less, and the light emitted from each of the light-emitting units is incident on the optical lens via the first lens and emitted from the first lens at a second half-width angle smaller than the first half-width angle.

[0016] In addition, a light source device according to another embodiment of the present disclosure is made based on the above findings, and is a light source device for irradiating light onto two or more irradiation regions, having a light emitting surface on an upper surface, emitting light from the light emitting surface at a first half-value full angle, and including a plurality of individually lightable light emitting portions arranged in a matrix, a first lens covering the light emitting surfaces of the plurality of light emitting portions, a first surface including a plurality of incident regions, and a second surface including a plurality of exit regions, and further including an optical lens positioned above the light emitting surfaces of the light emitting portions. Light emitted from each of the light emitting portions enters the optical lens via the first lens, and exits from the first lens at a second half-value full angle smaller than the first half-value full angle. The first lens includes a plurality of unit first lenses provided for each of the light emitting portions, and the optical axis of at least one of the unit first lenses is inclined at an angle γ with respect to the optical axis of the optical lens. The angle γ is determined using the shortest distance L (0 < L) from the optical axis of the optical lens to the center of the light emitting surface of the light emitting portion arranged at the corner of the matrix, the shortest distance x (0 < x ≦ L) from the optical axis of the optical lens to the center of the light emitting surface of the light emitting portion covered by the unit first lens having an optical axis provided to be inclined, and the angle α (0° < α < 180°) formed by a straight line connecting the center point, which is the intersection point of the plane in which the light emitting surfaces of the plurality of light emitting portions extend and the optical axis of the optical lens, and one of two points located at the diagonal of the region including all the irradiation regions, and a straight line connecting the center point and the other of the two points. It is represented as TIFF2026123124000003.tif1277.

[0017] Embodiment 1. Embodiment 1 Hereinafter, as an example of the light source device according to the present disclosure, the flash light source of Embodiment 1 according to the present disclosure will be described with reference to the drawings. The flash light source 1 according to this embodiment is a light source for illuminating two or more illumination areas with light emitted from a light-emitting unit. Here, an illumination area is an area that extends outward from a certain direction. In this embodiment, two or more illumination areas are areas that, when two or more light-emitting units are individually lit, have a predetermined distance between their centers, have a predetermined size, and are individually illuminated by the light emitted from each light-emitting unit. Furthermore, it does not mean an area that is illuminated by the combined light emitted from two or more light-emitting units, but rather each area that is individually illuminated by the light emitted from two or more light-emitting units. In the flash light source 1 according to this embodiment, as will be described later, multiple light-emitting units are provided to correspond to multiple illumination areas with different directions. As a result, by selecting and lighting one or more of the multiple light-emitting units, light can be emitted to a desired illumination area. As shown in Figure 1, the light source 1 comprises a substrate 2, 25 light-emitting units 41 arranged on the upper surface 2a of the substrate 2, a first lens 10 that covers the light-emitting surface 41a located on the upper surface of each light-emitting unit 41 and includes 25 unit first lenses 11 provided corresponding to each light-emitting unit 41, and an optical lens 30 located above the light-emitting units 41. The optical lens 30 focuses or projects the light emitted from the light-emitting units 41 toward the corresponding illumination area. The optical lens 30 has a first surface 31 on the side of the light-emitting surface 41a of the light-emitting unit 41, and a second surface 32 on the opposite side of the first surface 31. The first surface 31 corresponds to each light-emitting unit 41 and includes a plurality of incident regions 33 into which light emitted from the light-emitting unit is incident. The second surface 32 includes a plurality of exit regions 34 corresponding to each incident region 33. Note that the incident regions 33 and exit regions 34 shown in the illustration are exaggerated to indicate their size. Light emitted from each light-emitting unit 41 enters the optical lens 30 via the first lens 10, and then exits the optical lens 30, illuminating the corresponding illumination areas of each light-emitting unit 41. In this embodiment, a frame 3 covering 25 light-emitting units 41, the first lens 10, and the optical lens 30 is arranged on the upper surface 2a of the substrate 2. To facilitate understanding of the internal structure of the light source 1, the optical lens 30 and frame 3 in Figure 1 are shown in cross-section with some parts omitted.

[0018] Here, for example, when we say that the unit first lens 11 is provided in "correspondence" to the light-emitting unit 41, it means that the unit first lens 11 is provided in a one-to-one relationship with the light-emitting unit 41 in order to receive the light emitted from the light-emitting unit 41 and emit it toward the optical lens 30. Also, for example, the emission region 34 "corresponding" to the incidence region 33 means the region that emits the light that has entered the optical lens 30 from the incidence region 33 toward the outside of the optical lens 30, and is provided in a one-to-one relationship with the incidence region 33. Furthermore, for example, the irradiation region "corresponding" to the light-emitting unit 41 means the region that the light emitted from the light-emitting unit 41 is intended to irradiate, and is provided in a one-to-one relationship with the light-emitting unit 41. Thus, in this specification, "correspondence" refers to relationships between members, regions, members, and other related relationships.

[0019] (Arrangement of light-emitting parts) The 25 light-emitting units 41 are arranged in a 5x5 matrix, as shown in Figure 2A. The light-emitting unit located at the center of the 25 light-emitting units 41 (central light-emitting unit 50) is the light-emitting unit arranged in the 3rd row and 3rd column. In this embodiment, the top view shape of each light-emitting section 41 (including the central light-emitting section 50) is square, and adjacent light-emitting sections 41 are arranged touching each other, but this is not limited to this. For example, the top view shape of the light-emitting section 41 may be rectangular, circular, polygonal, etc. For example, adjacent light-emitting sections 41 may be arranged spaced apart from each other. Also, the top view shapes of the respective light-emitting surfaces 41a of each light-emitting section 41 may be similar. For example, as shown in Figure 2B, the size of the light-emitting surfaces 50A1, 41a1, and 41a2 may decrease as they move away from the central light-emitting section 50A. Also, for example, as shown in Figure 2C, the size of the light-emitting surfaces 50B1, 41b1, and 41b2 may increase as they move away from the central light-emitting section 50B. In other words, the size of the light-emitting surface 41a of each light-emitting section 41 may differ depending on the location where the light-emitting section 41 is arranged in the matrix arrangement. Here, the further the light-emitting part 41 is positioned from the optical axis of the optical lens 30, the longer the distance to the corresponding illumination area becomes, making it difficult to control the light distribution and tending to increase light loss. Therefore, as shown in Figure 2C, by making the light-emitting surfaces 41b1 and 41b2 larger for the light-emitting parts 41 that are farther from the central light-emitting part 50B, the amount of light in the light-emitting parts 41 that are farther from the central light-emitting part 50B can be increased, and the decrease in brightness can be suppressed. Furthermore, the number of light-emitting units 41 is not limited to 25, but can be two or more. Moreover, the arrangement of the multiple light-emitting units 41 is not limited to an m x m (m≧2) matrix, but may be an m x n (m≧1, n≧2, m≠n) matrix, or it may be an arrangement that is not matrix-like. For example, four light-emitting units 41 may be arranged in a 2 x 2 arrangement, and 12 other light-emitting units 41 may be arranged on the outer perimeter of the four light-emitting units 41, with four on each side, for a total of 12 units, and then 8 more light-emitting units 41 may be arranged on the outer perimeter of those, with two on each side excluding the corners. This allows the multiple light-emitting units 41 to be arranged in a shape close to a circle in plan view, and by making the optical lens 30 circular in plan view, light from the multiple light-emitting units 41 can be efficiently incident on the optical lens 30. Also, the distance between adjacent light-emitting units 41 or between adjacent light-emitting surfaces 41a may be different. In other words, the distance between two adjacent light-emitting units 41 or two light-emitting surfaces 41a in the row direction may be shorter than the distance between two adjacent light-emitting units 41 or two light-emitting surfaces 41a in the column direction.

[0020] (Arrangement of irradiation areas) As shown in Figure 3, the light source 1 according to this embodiment irradiates light into a region R1 that is divided into 25 irradiation regions. The region R1 and each irradiation region shown in the figure are schematically depicted in a plane to facilitate understanding of the invention, but in reality they may be in a three-dimensional space. The 25 irradiation regions are arranged in a 5x5 matrix. Each irradiation region is provided corresponding to one light-emitting unit 41 and is irradiated by light emitted from the corresponding light-emitting unit 41. In this embodiment, 25 irradiation regions are arranged in a matrix, but the embodiment is not limited to this. For example, the number of irradiation regions can be two or more. However, it is desirable that the number of irradiation regions be the same as the number of light-emitting units 41. Furthermore, the arrangement of the multiple irradiation regions is not limited to an i-row, i-column (i≧2) matrix, but may also be an i-row, j-column (i≧1, j≧2, i≠j) matrix, or it may be an arrangement that is not matrix-like. However, it is desirable that the arrangement of the irradiation regions be the same as the arrangement of the light-emitting units 41.

[0021] (The relationship between the light-emitting part and the irradiation area) In this embodiment, as shown in Figure 3, the arrangement of each light-emitting unit 41 and the corresponding illumination area is point-symmetric with respect to a point O located directly above the midpoint P of the light-emitting surface 50a of the central light-emitting unit 50. That is, each light-emitting unit 41 and the illumination area irradiated by the light emitted from it are in a point-symmetric arrangement with respect to a point unique to the light-emitting unit 41, and the unique point for each of the multiple light-emitting units is the same point (point O). For example, illumination area R33 located in the 3rd row and 3rd column of the 25 illumination areas corresponds to the illumination area of ​​the central light-emitting unit 50 located in the 3rd row and 3rd column of the 25 light-emitting units 41. For example, illumination area R35 located in the 3rd row and 5th column of the 25 illumination areas corresponds to the illumination area of ​​the light-emitting unit 55 located in the 3rd row and 1st column of the 25 light-emitting units 41. For example, illumination area R42 located in the 4th row and 2nd column of the 25 illumination areas corresponds to the illumination area of ​​the light-emitting unit 60 located in the 2nd row and 4th column of the 25 light-emitting units 41. As previously described, the light-emitting unit 41 and the corresponding irradiation area are provided in a one-to-one relationship, but this does not mean that the light emitted from the light-emitting unit 41 is limited to actually illuminating only the corresponding irradiation area. The irradiation area corresponding to the light-emitting unit 41 is the irradiation area that the light-emitting unit 41 is intended to irradiate. Therefore, in reality, the light emitted from one light-emitting unit 41 can also irradiate adjacent irradiation areas (or nearby irradiation areas). In other words, as shown in Figure 3, one irradiation area may include an area (first irradiation area) R1A that is irradiated only by the light emitted from the corresponding light-emitting unit 41, and an area (second irradiation area) R1B that is irradiated by the light emitted from the corresponding light-emitting unit 41 and the light emitted from a light-emitting unit 41 adjacent to the corresponding light-emitting unit 41 (or nearby light-emitting unit 41). Alternatively, one irradiation area may not include the first irradiation area R1A, but only include the second irradiation area R1B.

[0022] In the above description, the arrangement of each light-emitting unit 41 and the corresponding irradiation area is assumed to be point-symmetric with respect to a single point O, but this is not the only possible arrangement. For example, the point used as the reference point for point symmetry for each light-emitting unit 41 may be different. That is, each light-emitting unit 41 and the illumination area irradiated by the light emitted from the light-emitting unit are in a point-symmetric arrangement with respect to a point unique to the light-emitting unit 41. Furthermore, this unique point is, for example, a point on the optical axis B1 of the unit first lens 11 provided in correspondence with the light-emitting unit 41. Therefore, the light-emitting unit 41 and the illumination area irradiated by the light emitted from the light-emitting unit 41 may be in a point-symmetric arrangement with respect to a point located on the optical axis B1 of the unit first lens 11. And the aforementioned point corresponding to each of the multiple light-emitting units may be the same point. Furthermore, for example, the point used as the reference point for point symmetry (a single point O in this embodiment) does not necessarily have to be located directly above the midpoint P of the light-emitting surface 50a.

[0023] (Light distribution of light emitted from each light-emitting part) Next, with reference to Figure 1, the light distribution from the light-emitting unit 41 to the corresponding irradiation area will be described in detail. Light emitted from the light-emitting surface 41a of the light-emitting unit 41 at a first half-maximum angle θ1 first enters the corresponding unit first lens 11, where the unit first lens 11 narrows the half-maximum angle to a second half-maximum angle θ2 (θ1 > θ2). By setting the optical axis of the unit first lens 11 to be parallel to or inclined with respect to the optical axis B2 of the optical lens 30, the light has directionality toward the corresponding illumination area. Light emitted from the unit first lens 11 enters the optical lens 30 from an incident area 33 provided corresponding to each light-emitting unit 41. Light that enters the optical lens 30 exits the optical lens 30 from an exit area 34 provided corresponding to each incident area 33, illuminating, for example, an illumination area positioned point-symmetric with respect to a point O with respect to each light-emitting unit 41.

[0024] The example point O is, as will be described later, a point on the optical axis B2 of the optical lens 30. Therefore, the light emitted from the central light-emitting unit 50 is emitted along the optical axis B2 of the optical lens 30, that is, in a direction approximately parallel to the optical axis B2, illuminating the illumination area R33 located directly above it, while the light emitted from the light-emitting units other than the central light-emitting unit 50 intersects with the optical axis B2 of the optical lens 30 and then illuminates the corresponding illumination area. Here, in this specification, "along the optical axis of the optical lens" specifically means "through the optical axis of the optical lens." In this embodiment, since the light-emitting unit 41 and the corresponding illumination area are positioned point-symmetrically with respect to a point O located directly above the central light-emitting unit 50, the light emitted from the light-emitting units 41 other than the central light-emitting unit 50 intersects with the optical axis B2 of the optical lens 30 and illuminates the corresponding area. However, which light-emitting unit 41 intersects with the optical axis B2 of the optical lens 30 depends on the arrangement relationship between the light-emitting unit 41 and the illumination area. In other words, in this embodiment, the light emitted from each of the multiple light-emitting units 41 intersects with the optical axis B2 of the optical lens 30 or passes through the optical axis B2 of the optical lens 30 to illuminate the irradiation area.

[0025] In the light source 1 disclosed in this embodiment, one of the elements for irradiating the corresponding irradiation area with light emitted from each light-emitting unit 41 is the shape of the incident region 33 on the first surface 31 and the exit region 34 on the second surface 32 of the optical lens 30. Specifically, the refraction of light in the incident region 33 and the refraction of light in the exit region 34 cause the light emitted from each light-emitting unit 41 to irradiate the corresponding irradiation area. To this end, the shape of the incident region 33 on the first surface 31 and the shape of the exit region 34 on the second surface 32 are set.

[0026] The refraction of the optical lens 30 in the incident region 33 and the refraction in the exit region 34 are obtained by the difference between the refractive index of the optical lens 30 and the refractive index of the medium in contact with the optical lens 30. Therefore, when setting the shape of the first surface 31 including the incident region 33 and the shape of the second surface 32 including the exit region 34 of the optical lens 30, the difference in refractive index between the refractive index of the optical lens 30 and the refractive index of the medium in contact with the optical lens 30 is also a parameter that should be considered. In the light source 1 of this embodiment, the medium in contact with the optical lens 30 is space, and within that space, for example, air is located. Therefore, in this embodiment, the difference between the refractive index of the optical lens 30 and the refractive index of the medium in contact with the optical lens 30 is the difference in refractive index between the optical lens 30 and air.

[0027] Furthermore, the light incident on the optical lens 30 enters through the unit first lens 11. Therefore, the light distribution characteristics of the unit first lens 11 are also factors that cause the light emitted from the light-emitting unit 41 to illuminate the corresponding illumination area. Specifically, this refers to the direction of emission (directivity) of the light emitted from the unit first lens 11, and this emission direction sets the direction of the optical axis of each unit first lens 11.

[0028] In order to illuminate the corresponding irradiation area with light emitted from the light-emitting unit 41, the shapes of the first surface 31 and the second surface 32 of the optical lens 30 are set. The difference in refractive index between the refractive index of the optical lens 30 and the refractive index of the medium in contact with the optical lens 30 is also a settable parameter. Furthermore, since the light incident on the optical lens 30 is light emitted from the unit first lens 11, the emission direction of the light emitted from the unit first lens 11 can also be a parameter. Thus, the shapes of the incident region 33 and the exit region 34, which are elements for irradiating the corresponding irradiation area with light emitted from the light-emitting unit 41, are set, for example, by simulation, taking into consideration the parameters exemplified above. The following will provide a detailed explanation of each component with reference to Figures 1, 4A, and 5.

[0029] (substrate) The substrate 2 is a wiring board with connecting electrodes on its upper surface 2a. The connecting electrodes are connected to the electrodes 44 of the light-emitting section 41, which will be described later.

[0030] (Frame) As shown in Figures 1 and 4A, a frame 3 is arranged on the upper surface 2a of the substrate 2. The frame 3 is hollow inside and has an opening 4 at its top. Preferably, the frame 3 has a light-absorbing member on its inner surface that does not reflect light. The light-absorbing member is made from, for example, polycarbonate, silicone resin, PPS (Polyphenylenyl Sarphayed), PA (polyamide), or LCP (Liquid Crystal Plastic). The entire frame 3 may also be made from the light-absorbing member. The light-emitting part 41, the first lens 10, and the optical lens 30 are arranged inside the cavity of the frame 3. The height from the top surface 2a of the substrate 2 to the top surface of the frame 3 is, for example, between 2.0 mm and 10.0 mm. By setting the height from the top surface 2a of the substrate 2 to the top surface of the frame 3 to this height, the light source device 1 can be mounted on small electronic devices such as smartphones.

[0031] (Light-emitting part) As shown in Figure 5, the light-emitting unit 41 includes a light-emitting element 42, a wavelength conversion member 45 that covers the upper surface of the light-emitting element 42, and a light-reflective member 46 that covers the sides of the light-emitting element 42 and the sides of the wavelength conversion member 45. The light-emitting element 42 comprises at least a semiconductor laminate 43 and an electrode 44 having two polarities (for example, a P-side electrode and an N-side electrode). The electrode 44 is electrically connected to the connecting electrode of the substrate 2. In the case of face-down mounting, it is desirable that the light-emitting element 42 emits light mainly from the side opposite to the side on which the electrode 44 is provided (hereinafter referred to as the top surface of the light-emitting element 42). The light-reflective member 46 is, for example, a white resin containing a light-diffusing material such as titanium dioxide. By covering the side surface of the light-emitting element 42 with the light-reflective member 46 in this way, the light emitted from the side surface of the light-emitting element 42 can be reflected by the light-reflective member 46 and emitted from the top surface of the light-emitting element 42. In other words, the light emitted from the light-emitting element 42 can be utilized efficiently. The wavelength conversion member 45 is formed from, for example, a silicone resin containing a phosphor. The upper surface of the wavelength conversion member 45 can be the light-emitting surface 41a of the light-emitting unit 41. By covering the upper surface of the light-emitting element 42 with the wavelength conversion member 45, light in a desired wavelength range can be emitted from the light-emitting surface 41a of the light-emitting unit 41. Each of the light-emitting units 41 configured in this way can be controlled to light up independently. In other words, multiple light-emitting units 41 can be lit individually.

[0032] (First lens) The first lens 10 is provided to narrow the full angle at half maximum of the light emitted from the light-emitting unit 41 and to give directionality to the illumination area corresponding to the light. The first lens 10 includes a plurality of unit first lenses 11 provided for each light-emitting unit 41. The first lens 10 in this embodiment consists of 25 unit first lenses 11 provided for each of the 25 light-emitting units 41. As shown in Figure 1, each unit first lens 11 is provided separately. However, as shown in Figure 4B, the unit first lens 11 may be connected to adjacent unit first lenses and integrated into a single component. The first lens 10A, configured in this way with integrated unit first lenses, covers each light-emitting surface 41a of the 25 light-emitting units 41 collectively and can be described as a single lens including the 25 unit first lenses 11 provided for each light-emitting unit 41.

[0033] In this embodiment, the first unit lens 11 is a Total Internal Reflection (TIR) ​​lens. Here, a Total Internal Reflection lens is a lens that can adjust the directivity of light by utilizing total internal reflection within the lens. As shown in Figure 5, the Total Internal Reflection lens used in this embodiment has a lower surface 13 with a recess 14 and an upper surface 12 with a corrugated cross-sectional shape, and is a substantially frustoconical lens that tapers from the upper surface 12 to the lower surface 13. The Total Internal Reflection lens used in this embodiment has a rotationally symmetric shape around the optical axis B1.

[0034] The unit first lens 11, which is an internal total internal reflection lens, is positioned such that the inner surface 14a of the recess 14 is located above the light-emitting surface 41a of the light-emitting unit 41, and the light-emitting surface 41a is covered by the inner surface 14a. In other words, the unit first lens 11 is positioned such that the open end 16 of the recess 14 (the connection point between the inner surface 14a of the recess 14 and the lower surface 13) is located outside the outer circumference of the light-emitting surface 41a when viewed from above.

[0035] Next, with reference to Figures 1, 2A, and 4A, the direction of extension of the optical axis B1 of the unit first lens 11 will be described. The unit first lenses 11, which are arranged in a 5x5 matrix, are positioned corresponding to each of the light-emitting units 41, which are arranged in a 5x5 matrix, as shown in Figure 2A. It is sufficient that the optical axis B1 of at least one unit first lens 11 is inclined with respect to the optical axis B2 of the optical lens 30. In this embodiment, as shown in Figures 1 and 4A, the unit first lenses 11 other than the unit first lens (central unit first lens) 20 positioned on the central light-emitting unit 50 are each positioned with their optical axis B1 inclined with respect to the optical axis B2 of the optical lens 30, which will be described later. In this specification, "inclined" means that the two optical axes intersect at an angle, that is, the two optical axes are not parallel. The inclination angle of the optical axis B1 of the unit first lenses 11 other than the central unit first lens 20 with respect to the optical axis B2 of the optical lens 30 is appropriately set according to the arrangement relationship between the light-emitting unit 41 on which the unit first lens 11 is positioned and the illumination area corresponding to the light-emitting unit 41. Specifically, the inclination angle is set so that the light emitted from the unit first lens 11 has a greater directivity toward the corresponding illumination area compared to the case where the unit first lens 11 is not present. Therefore, the inclination angle can be set to a different value for each unit first lens 11, depending on the arrangement relationship between the light-emitting unit 41 on which the unit first lens 11 is located and the illumination area corresponding to the light-emitting unit 41.

[0036] As described above, in this embodiment, the 25 light-emitting units 41 arranged in a 5x5 grid and the illumination area corresponding to each light-emitting unit 41 have a point-symmetric arrangement with respect to a point O above the central light-emitting unit 50. Therefore, (1) The angle at which the optical axis of the unit first lens 11 located in the 3rd row and 2nd column and the optical axis of the unit first lens 11 located in the 3rd row and 4th column are inclined with respect to the optical axis B2 of the optical lens 30 is the same angle (first angle); (2) The angle at which the optical axis of the unit first lens 11 located in the 2nd row and 3rd column and the optical axis of the unit first lens 11 located in the 4th row and 3rd column are inclined with respect to the optical axis B2 of the optical lens 30 is the same angle (second angle); (3) The angle at which the optical axis of the unit first lens 11 located in the 2nd row and 2nd column, the optical axis of the unit first lens 11 located in the 2nd row and 4th column, the optical axis of the unit first lens 11 located in the 4th row and 2nd column, and the optical axis of the unit first lens 11 located in the 4th row and 4th column are inclined with respect to the optical axis B2 of the optical lens 30 is the same angle (third angle); (4) The angle at which the optical axis of the unit first lens 11 located in the 3rd row, 1st column and the optical axis of the unit first lens 11 located in the 3rd row, 5th column are inclined with respect to the optical axis B2 of the optical lens 30 is the same angle (the fourth angle); (5) The angle at which the optical axis of the unit first lens 11 located in the 1st row, 3rd column and the optical axis of the unit first lens 11 located in the 5th row, 3rd column are inclined with respect to the optical axis B2 of the optical lens 30 is the same angle (the 5th angle); (6) The angle at which the optical axis of the unit first lens 11 located in the 2nd row, 1st column, the optical axis of the unit first lens 11 located in the 2nd row, 5th column, the optical axis of the unit first lens 11 located in the 4th row, 1st column, and the optical axis of the unit first lens 11 located in the 4th row, 5th column are inclined with respect to the optical axis B2 of the optical lens 30 is the same angle (the 6th angle); (7) The angle at which the optical axis of the unit first lens 11 located in the 1st row, 2nd column, the optical axis of the unit first lens 11 located in the 1st row, 4th column, the optical axis of the unit first lens 11 located in the 5th row, 2nd column, and the optical axis of the unit first lens 11 located in the 5th row, 4th column are inclined with respect to the optical axis B2 of the optical lens 30 is the same angle (the 7th angle); (8) The angle at which the optical axis of the unit first lens 11 located in the 1st row, 1st column, the optical axis of the unit first lens 11 located in the 1st row, 5th column, the optical axis of the unit first lens 11 located in the 5th row, 1st column, and the optical axis of the unit first lens 11 located in the 5th row, 5th column are inclined with respect to the optical axis B2 of the optical lens 30 is the same angle (the 8th angle).

[0037] Furthermore, if the top view shape of the light-emitting section 41 is square and the dimensions of the light-emitting surface 41a of each light-emitting section 41 are the same, (a) The first angle and the second angle are the same angle; (b) The fourth and fifth angles are the same angle; (c) The sixth and seventh angles are the same angle; (d) The third angle is set to be greater than the first and second angles; (e) The fourth and fifth angles are set to be greater than the first and second angles; (f) The sixth and seventh angles are set to be greater than the fourth and fifth angles; (g) The eighth angle is set to be greater than the sixth and seventh angles.

[0038] When the light-emitting units 41 are arranged in a matrix, a specific method for calculating the angle γ (see Figure 4C) at which the optical axis B1 of at least one unit first lens 11 is inclined with respect to the optical axis B2 of the optical lens 30 will be explained with reference to Figure 20. Note that in Figure 20, the unit first lens 11 is omitted to facilitate understanding of the figure. When the light-emitting units 41 are arranged in a matrix, (a) The shortest distance from the optical axis B2 of the optical lens 30 to the center of the light-emitting surface 41a of the light-emitting part 41 located in the corner of the matrix is ​​L(0 <L)とし; (i) The shortest distance to the center of the light-emitting surface 41a of the light-emitting unit 41, which is covered by a unit first lens 11 having an optical axis B1 that is tilted from the optical axis B2 of the optical lens 30 (in the example shown in Figure 20, the light-emitting surface 41a of the light-emitting unit 41 located in the 3rd row and 4th column) is x(0 <x≦L)とし; (c) When the center point Q0 is defined as the point of intersection between the plane on which the light-emitting surfaces 41a of the multiple light-emitting units 41 extend and the optical axis B2 of the optical lens 30 (in the example shown in Figure 20, the center P of the light-emitting surface 50a of the central light-emitting unit 50), the angle between the straight line S1 connecting the center point Q0 and one of the two points Q1 located diagonally across the region R1 (the region including all two or more illumination regions), and the straight line S2 connecting the center point Q0 and the other point Q2 of those two points, is defined as α (0° < α < 180°). The angle γ can be calculated, for example, using equation 1 below. Note that the light-emitting parts 41 located at the corners of the matrix are the light-emitting parts located at the four corners of the matrix. Therefore, in the case of a 5x5 matrix, the light-emitting parts 41 located at the corners of the matrix are, for example, the light-emitting part 41 in the 1st row, 1st column, 1st row, 5th column, 5th row, 1st column, or 5th row, 5th column. Equation 1

[0039] TIFF2026123124000004.tif1277

[0040] (Optical lens) As shown in Figure 4A, the optical lens 30 is positioned above the light-emitting section 41 and covers the 25 light-emitting sections 41 and the first lens 10 together. The optical lens 30 according to this embodiment is composed of multiple lenses, and in detail, it is composed of a first optical lens 36, a second optical lens 37, and a third optical lens 38, which are arranged in order from the first lens 10 side. The first optical lens 36, the second optical lens 37, and the third optical lens 38 are arranged with a space between them. For example, air is located in the space. The first optical lens 36, the second optical lens 37, and the third optical lens 38 are each supported and fixed by placing their ends on support parts 5 provided on the inner side surface of the frame 3. Note that in the attached drawings, the support parts supporting the second optical lens 37 and the support parts supporting the third optical lens 38 are omitted. The first optical lens 36, the second optical lens 37, and the third optical lens 38 are arranged so that their optical axes coincide. Therefore, the optical axis B2 of the optical lens 30 is specified as a single axis. In this embodiment, the optical lens 30 is positioned such that its optical axis B2 is perpendicular to the upper surface 2a of the substrate 2 and passes through the midpoint P of the central light-emitting section 50. Accordingly, the point O that defines the point-symmetric arrangement relationship between the light-emitting section 41 and the corresponding illumination area is located on the optical axis B2 of the optical lens 30. The method of supporting the first optical lens 36, the second optical lens 37, and the third optical lens 38 is not limited to the method using the support portion 5 provided on the inner side surface of the frame 3. For example, the first optical lens 36, the second optical lens 37, and the third optical lens 38 may be supported by being attached to a support rod provided on the inner upper surface of the frame 3.

[0041] The optical lens 30 comprises a first surface 31 located on the side of the light-emitting surface 41a of the light-emitting unit 41, and a second surface 32 located on the opposite side of the first surface 31, i.e., on the side of the opening 4 of the frame 3. In this embodiment, when the optical lens 30 comprises a first optical lens 36, a second optical lens 37, and a third optical lens 38, the surface of the first optical lens 36 on the side of the light-emitting unit 41 is the first surface 31, and the surface of the third optical lens 38 on the side of the opening 4 of the frame 3 is the second surface 32.

[0042] The first surface 31 includes a plurality of incident regions 33, each corresponding to a light-emitting section 41, into which light emitted from each of the light-emitting sections 41 is incident. The second surface 32 includes a plurality of exit regions 34, each corresponding to a plurality of incident regions 33. As previously described, determining the light distribution of the light emitted from each light-emitting unit 41 involves setting the shape of the first surface 31, which includes the incident region 33, and the second surface 32, which includes the exit region 34, of the optical lens 30. In this embodiment, the optical lens 30 is composed of three lenses: a first optical lens 36, a second optical lens 37, and a third optical lens 38, which are separated from each other by air. Therefore, the light distribution between the incident region 33 and the exit region 34 may be influenced by the shape of the region from which light is emitted from the first optical lens 36 (exit region), the difference between the refractive index of the first optical lens 36 and the refractive index of air, the shape of the region from which light is incident on the second optical lens 37 (incident region), the shape of the region from which light is emitted from the second optical lens 37 (exit region), the difference between the refractive index of the second optical lens 37 and the refractive index of air, the shape of the region from which light is incident on the third optical lens 38 (incident region), and the difference between the refractive index of the third optical lens 38 and the refractive index of air. Therefore, the shapes of the injection region 33 and the exit region 34 are designed taking these factors into consideration.

[0043] Each incident region 33 into which light emitted from adjacent light-emitting units 41 enters the optical lens 30 may partially or completely overlap depending on the magnitude of the full-angle at half maximum of the light emitted from the corresponding unit first lens 11, the distance from the unit first lens 11 to the optical lens 30, the inclination angle of the optical axis B1 of the unit first lens 11 with respect to the optical axis B2 of the optical lens 30, etc. Therefore, two adjacent incident regions 33 of the optical lens 30 may partially or completely overlap. In this specification, among each incident region 33, the region into which only light emitted from the corresponding unit first lens 11 enters is called the first incident region 33c, and among each incident region 33, the region that overlaps with an adjacent incident region 33 is called the second incident region 33d. The first incident region 33c and the second incident region 33d are shown in Figure 4C. Therefore, each incident region 33 of the optical lens 30 may include a first incident region 33c into which light emitted from a light-emitting unit 41 corresponding to the incident region 33 is incident, and a second incident region 33d into which, in addition to the said light, light emitted from a light-emitting unit 41 adjacent to the light-emitting unit 41 is incident. For this reason, each incident region 33 is not necessarily designed independently, but can be designed appropriately in relation to adjacent incident regions.

[0044] Similarly, the respective exit regions 34 from which light incident on the optical lens 30 from each adjacent incident region 33 exit the optical lens 30 may partially or completely overlap depending on the position of the corresponding incident region 33, the difference in refractive index between the optical lens 30 and the medium in contact with the optical lens 30, the arrangement of the corresponding illumination regions, etc. Therefore, two adjacent exit regions 34 of the optical lens 30 may partially or completely overlap. In this specification, among each exit region 34, the region from which only light emitted from the corresponding unit first lens 11 exits is called the first exit region 34c, and among each exit region 34, the region that overlaps with an adjacent exit region 34 is called the second exit region 34d. The first exit region 34c and the second exit region 34d are shown in Figure 4A. Accordingly, each exit region 34 of the optical lens 30 may include a first exit region 34c from which light incident on the optical lens 30 via an incident region 33 corresponding to the exit region 34 is emitted, and a second exit region 34d from which, in addition to the said light, light incident on the optical lens 30 from an incident region 33 adjacent to the incident region 33 is emitted. Therefore, each exit region 34 is not necessarily designed independently, but can be appropriately designed in relation to adjacent exit regions 34.

[0045] Furthermore, as shown in Figure 4C, the shortest distance d0 between the first surface 31 of the optical lens 30 and the first lens 10 is, for example, 0.1 mm or more and 1.0 mm or less, preferably, for example, 0.1 mm or more and 0.5 mm or less. In this embodiment, the shortest distance d0 refers to the closest distance between them, regardless of the shape of the first surface 31 of the optical lens 30 and the shape of the first lens 10. By setting the shortest distance d0 between the first surface 31 of the optical lens 30 and the first lens 10 to this height, the light source device 1 can be mounted on a small electronic device such as a smartphone.

[0046] Next, with reference to Figures 6A to 7B, the light distribution of the light emitted from each light-emitting unit 41 will be explained in detail.

[0047] (Light distribution from the central light-emitting part 50) As shown in Figures 6A and 6B, the light emitted from the light-emitting surface 50a of the central light-emitting section 50 at the first half-maximum angle θ1 is mainly, (1) Incident onto the central first lens 20 from the inner surface 23a of the recess 23 of the central unit first lens 20 (See Figure 6A) (2) Total internal reflection occurs at the inner side surface 24 of the central unit first lens 20, (3) Emitted from the upper surface 21 of the central unit first lens 20 at the second half-maximum full angle θ2, (4) Light enters the optical lens 30 from the incident region 33a corresponding to the central light-emitting section 50 (see Figure 6B), (5) The light exits from the exit region 34a corresponding to the incident region 33a, (6) The irradiation area R33 corresponding to the central light-emitting unit 50 (the irradiation area located directly above the central light-emitting unit 50) is irradiated.

[0048] Since the central light-emitting unit 50 illuminates the illumination area R33 located directly above it, the central unit first lens 20 is positioned so that its optical axis B1 is perpendicular to the light-emitting surface 50a of the central light-emitting unit 50. In other words, the optical axis of the central unit first lens 20 is positioned on the optical axis B2 of the optical lens 30. The shape of the incident region 33a (incident region of the first optical lens 36) of the optical lens 30 corresponding to the central light-emitting section 50, and the shape of the exit region 34a (exit region of the third optical lens 38) of the optical lens 30 corresponding to the incident region 33a, are appropriately designed so that the light emitted from the central unit first lens 20 illuminates the illumination region R33 located directly above the central light-emitting section 50. Similarly, the shape of the emission region of the first optical lens 36 corresponding to the central light-emitting section 50, the shape of the incident region and the emission region of the second optical lens 37, and the shape of the incident region of the third optical lens 38 are appropriately designed so that the light emitted from the central unit first lens 20 illuminates the illumination region R33 located directly above the central light-emitting section 50.

[0049] (Light distribution from light-emitting parts other than the central light-emitting part 50) The light distribution from light-emitting units other than the central light-emitting unit 50 differs depending on the position of the light-emitting unit, but it is the same in that the light emitted from the light-emitting unit intersects with the optical axis B2 of the optical lens 30 and illuminates the corresponding illumination area. Therefore, using the light-emitting section (surrounding light-emitting section) 55 (see Figure 2A) located in the third column of the first row as an example, we will explain the light distribution of light emitted from light-emitting sections other than the central light-emitting section 50. As shown in Figure 7A, the light emitted from the light-emitting surface 55a of the surrounding light-emitting section 55 at the first half-maximum full angle θ1 is mainly, (1) Light enters the peripheral unit first lens (peripheral unit first lens) 25 from the inner surface 28a of the recess 28 of the unit first lens (peripheral unit first lens) 25 which is positioned to cover the light-emitting surface 55a of the peripheral unit 55 (see Figure 7A), (2) Total internal reflection occurs at the inner side surface 29 of the peripheral unit first lens 25, (3) Emitted from the upper surface 26 of the peripheral unit first lens 25 at the second half-maximum full angle θ2, (4) Light enters the optical lens 30 from the incident region 33b corresponding to the surrounding light-emitting section 55 (see Figure 7B), (5) The optical axis B2 of the optical lens 30 intersects within the optical lens 30, (6) The light exits from the exit region 34b corresponding to the incident region 33b, (7) Irradiate the irradiation area R35 corresponding to the surrounding light-emitting part 55. Furthermore, the position where the light emitted from the ambient light-emitting section 55 intersects with the optical axis B2 of the optical lens 30 is not limited to within the optical lens 30, but can be any position from the point where the light is emitted from the ambient light-emitting section 55 until it illuminates the corresponding illumination area R35.

[0050] As described above, in this embodiment, the 25 light-emitting units 41 and the illumination areas corresponding to each light-emitting unit 41 are arranged in a point-symmetrical relationship with respect to a point O above the central light-emitting unit 50. Therefore, the peripheral unit first lens 25 is positioned such that its optical axis B1 intersects with the optical axis B2 of the optical lens 30 above the central light-emitting unit 50. As a result, the light emitted from the light-emitting units 41 through the peripheral unit lens 25 has higher directivity toward the corresponding illumination area R35 compared to the case where the peripheral unit lens 25 is not provided. The shape of the incident region 33b (incident region of the first optical lens 36) of the optical lens 30 corresponding to the ambient light-emitting section 55, and the shape of the exit region 34b (exit region of the third optical lens 38) of the optical lens 30 are appropriately designed so that the light emitted from the ambient unit first lens 25 illuminates the illumination region R35, which is positioned point-symmetrically with respect to the ambient light-emitting section 55 and a point O. Similarly, the shape of the emission region of the first optical lens 36, the shape of the incident region and the emission region of the second optical lens 37, and the shape of the incident region of the third optical lens 38 are appropriately designed so that the light emitted from the peripheral unit first lens illuminates an illumination region that is positioned point-symmetric with respect to a point O and the peripheral light-emitting portion.

[0051] As described above, the light source 1 according to this embodiment includes a first lens 10 positioned to cover the light-emitting surface 41a of the light-emitting unit 41. The light emitted from the light-emitting surface 41a of the light-emitting unit 41 has its half-width narrowed by the first lens 10, and after having high directivity toward the corresponding illumination area, it enters the optical lens 30. This makes it possible to efficiently illuminate the corresponding desired illumination area with the light emitted from the light-emitting surface 41a of the light-emitting unit 41.

[0052] 2. Embodiment 2 The light source 201 according to Embodiment 2 shown in Figure 8 differs from the light source 1 according to Embodiment 1 in that the unit first lens is a lens having one convex surface (convex face) on the optical lens 30 side. The unit first lens 211 according to Embodiment 2 has, for example, a semicircular cross-sectional shape, and the convex face 211a is formed as a smooth curved surface. The unit first lens 211 is arranged so that the light-emitting surface 41a of the light-emitting unit 41 is covered by the lower surface 211b. Because such a unit first lens 211 has a simple shape, it is easy to form the mold used to create the unit first lens 211.

[0053] 3. Embodiment 3 The light source 301 according to Embodiment 3 shown in Figure 9 differs from the light source 1 according to Embodiment 1 in that the unit first lens is a frustum lens in which the area of ​​the upper surface 312 is larger than the area of ​​the lower surface 313. In Embodiment 3, the shape of the upper surface 312 and lower surface 313 of the unit first lens 311 is, for example, circular, triangular, or square. The unit first lens 311 is arranged so that the light-emitting surface 41a of the light-emitting unit 41 is covered by the lower surface 313. The unit first lens 311 is not limited to a frustum lens in which the area of ​​the upper surface 312 is larger than the area of ​​the lower surface 313, but may also be a frustum lens in which the area of ​​the upper surface 312 is smaller than the area of ​​the lower surface 313, or a columnar lens in which the area of ​​the upper surface 312 and the area of ​​the lower surface 313 are equal. Such a unit first lens 311 can also adjust the directivity of light by utilizing reflection inside the unit first lens 311, similar to the internal total internal reflection lens described above. Because such a unit first lens 311 has a simple shape, it is easy to form the mold used to create the unit first lens 311.

[0054] 4. Embodiment 4 This embodiment, and embodiments 5 and 6 described later, differ from the light source 1 according to embodiment 1 in that the first lens covers the light-emitting surfaces 41a of a plurality of light-emitting units 41 collectively and has at least one convex surface (convex face) on the optical lens 30 side.

[0055] The first lens 410 of the light source 401 according to this embodiment has a single convex surface (convex face) 410a on the optical lens 30 side. As shown in Figure 10, the first lens 410 has an arc-shaped contour of the convex face 410a in cross-section, and the convex face 410a is formed as a smooth curved surface. The first lens 410 is arranged so that the light-emitting surfaces 41a of all light-emitting parts 41 are covered collectively by the lower surface 410b. Because such a first lens 410 has a simple shape, it is easy to form the mold used to create the first lens 410. Furthermore, unlike Embodiment 1, it is not necessary to adjust the arrangement of the corresponding lens (unit first lens 11) for each light-emitting part 41. For example, the optical axis B4 of the first lens 410 can be placed on the optical axis B2 of the optical lens 30, thus simplifying the manufacturing process.

[0056] Furthermore, the curvature of the convex surface 410a of the first lens 410 may be the same from the optical axis B4 to the end of the first lens 410, or it may be different depending on the distance from the optical axis B4. In particular, by increasing the curvature of the convex surface 410a of the first lens 410 from the optical axis B4 towards the end of the first lens 410, the following effects can be expected. First, of the light emitted from the light-emitting units 41 located near the ends of the convex surface 410a of the first lens 410 (for example, in this embodiment, the light-emitting units 41 located in the 1st row, kth column, 5th row, kth column, and kth row, 1st column, and kth column, 5th column (k=1 to 5)), light that deviates from the direction in which the directionality is desired (in this embodiment, the direction of the illumination area corresponding to the light-emitting unit 41), in particular light directed toward the frame 3, is less likely to enter the optical lens 30. Therefore, the light loss from the light-emitting units 41 becomes large. To address this, by making the curvature of the ends of the convex surface 410a of the first lens 410 larger than the curvature of the central part, the light emitted from the light-emitting units 41 located near the ends of the convex surface 410a that is directed toward the frame 3 can be refracted in the direction in which the directionality is desired, thereby reducing the light loss from the light-emitting units 41.

[0057] 5. Embodiment 5 The first lens 510 of the light source 501 according to this embodiment has a convex surface 510a on the optical lens 30 side. As shown in Figure 11, the first lens 510 includes a flat surface 510b located in the center of the convex surface 510a, and a curved surface 510c located at the end of the first lens 510, connecting the flat surface 510b and the lower surface 510d of the first lens 510. The flat surface 510b is perpendicular to the optical axis B2 of the optical lens 30. The curved surface 510c is curved outward from the first lens 510. The first lens 510 is positioned so that the upper surface 41a of all the light-emitting parts 41 is covered collectively by the lower surface 510d. As described for the light source 401 of Embodiment 4, in the light source 501 according to this embodiment, by increasing the curvature of the end side of the curved surface 510c of the first lens 510, the light emitted from the light-emitting part 41 located near the end of the first lens 510 can be refracted in the direction in which directionality is desired (in this embodiment, the direction of the irradiation area corresponding to the light-emitting part 41). Therefore, the light loss from the light-emitting part 41 can be suppressed. Furthermore, by making the central part of the convex surface 510a of the first lens 510 flat, the lens thickness can be made thinner than that of the first lens which has a single convex curved surface across the entire optical lens 30 side, as in the light source 401 according to Embodiment 4, so that the light source can be miniaturized.

[0058] 6. Embodiment 6 The first lens 610 of the light source 601 according to this embodiment has a convex surface 610a on the optical lens 30 side. The convex surface 610a is a smoothly curved surface arranged in a ring shape around the optical axis B6 of the first lens 610, as shown in Figure 12. Therefore, in the cross-sectional shape of the first lens 610, the convex surface 610a has two vertices 610d. It is desirable that the vertices 610d of the convex surface 610a are positioned such that the distance d1 from the vertices 610d of the convex surface 610a to the optical axis B6 of the first lens 610 is shorter than the distance d2 from the vertices 610d of the convex surface 610a to the outer edge 610f of the first lens 610. The central portion of the first lens 610 is formed as a concave surface 610c that is continuous with the convex surface 610a, and the apex 610e of the concave surface 610c is positioned on the optical axis B6 of the first lens 610. The optical axis B6 of the first lens 610 is positioned to coincide with the optical axis B2 of the optical lens 30. It is preferable that the end of the first lens 610 (in this embodiment, the end of the convex surface 610a, near the outer peripheral end 610f) has a curvature greater than the curvature of the concave surface 610c. Furthermore, the first lens 610 is positioned so that the upper surface 41a of all the light-emitting parts 41 is covered collectively by the lower surface 610b.

[0059] 7. Embodiment 7 The light source according to Embodiment 7 differs from the light source 1 according to Embodiment 1 in that the unit first lenses other than the central unit first lens are internal total internal reflection lenses with a rotationally asymmetric shape around the optical axis, as shown in Figure 13. The unit first lenses 711 other than the central unit first lens according to Embodiment 7 are internal total internal reflection lenses with a rotationally asymmetric shape around the optical axis B7, formed such that the connection portion 716 (open end of the recess 714) between the lower surface 713 and the inner surface 714a of the recess 714 provided on the lower surface 713 surrounds the light-emitting surface 41a and is in contact with the upper surface 41b of the light-emitting unit 41. Such a unit first lens 711 covers the light-emitting surface 41a of the light-emitting unit 41 with the inner surface 714a of the recess 714 located on the light-emitting surface 41a side. Therefore, as shown by the arrow Y in Figure 13, almost all of the light emitted from the light-emitting surface 41a of the light-emitting unit 41 enters the unit first lens 711 through the inner surface 714a of the recess 714 of the unit first lens 711. This makes it possible to improve the utilization efficiency of the light emitted from the light-emitting unit 41.

[0060] Since the inclination angle of the unit first lens 711 with respect to the optical axis of the optical lens differs depending on which row and column the light-emitting part is located in in the 5x5 matrix, the shape of the unit first lens 711 differs according to each light-emitting part 41. However, in this embodiment, the 25 light-emitting units 41 and the illumination regions corresponding to each light-emitting unit 41 are arranged in a point-symmetrical relationship with respect to a point O above the central light-emitting unit 50. Therefore, (1) The unit first lens 711 located in the 3rd row and 2nd column and the unit first lens 711 located in the 3rd row and 4th column are identical in shape (shape 1); (2) The unit first lens 711 located in the 2nd row and 3rd column and the unit first lens 711 located in the 4th row and 3rd column are identical in shape (shape 2); (3-1) The unit first lens 711 located in the 2nd row and 2nd column and the unit first lens 711 located in the 4th row and 4th column are identical in shape (shape 3-1); (3-2) The unit first lens 711 located in the 2nd row and 4th column and the unit first lens 711 located in the 4th row and 2nd column are identical in shape (shape 3-2); (4) The unit first lens 711 located in the 3rd row, 1st column and the unit first lens 711 located in the 3rd row, 5th column are identical in shape (shape 4); (5) The unit first lens 711 located in the 1st row and 3rd column and the unit first lens 711 located in the 5th row and 3rd column are identical in shape (shape 5); (6-1) The unit first lens 711 located in the 2nd row and 1st column and the unit first lens 711 located in the 4th row and 5th column are identical in shape (shape 6-1); (6-2) The unit first lens 711 located in the 2nd row and 5th column and the unit first lens 711 located in the 4th row and 1st column are identical in shape (shape 6-2); (7-1) The unit first lens 711 located in the 1st row, 2nd column and the unit first lens 711 located in the 5th row, 4th column are identical in shape (shape 7-1); (7-2) The unit first lens 711 located in the 1st row, 4th column and the unit first lens 711 located in the 5th row, 2nd column are identical in shape (shape 7-2); (8-1) The unit first lens 711 located in the 1st row and 1st column and the unit first lens 711 located in the 5th row and 5th column are identical in shape (shape 8-1); (8-2) The unit first lens 711 located in the 1st row, 5th column and the unit first lens 711 located in the 5th row, 1st column are identical in shape (shape 8-2).

[0061] Furthermore, if the top view shape of the light-emitting section 41 is square and the dimensions of the light-emitting surface 41a of each light-emitting section 41 are the same, then shape 1 and shape 2 are the same shape, shape 4 and shape 5 are the same shape, shape 6-1 and shape 6-2, shape 7-1 and shape 7-2 are the same shape, shape 3-1 and shape 3-2 are the same shape, and shape 8-1 and shape 8-2 are the same shape.

[0062] 8. Embodiment 8 The light source 801 according to Embodiment 8 shown in Figure 14 differs from the light source 1 according to Embodiment 1 in that the wavelength conversion member provided by the light-emitting unit is arranged to cover the upper surface of the light-emitting element 42 and the upper surface of the light-reflecting member 46. The wavelength conversion member 845 according to Embodiment 8 may be provided for each light-emitting unit 41, or it may be a single member that covers the upper surface of all 25 light-emitting units 41 of the semiconductor laminate 43 and the upper surface of the light-reflecting member 46 collectively. Furthermore, since the wavelength conversion member 845 is a thin member, when the wavelength conversion member 845 is arranged to cover the upper surface of the light-emitting element 42 and the upper surface of the light-reflecting member 46 in this manner, the light-emitting surface 841a of the light-emitting section 841 can be considered to be the region of the wavelength conversion member 845 located directly above the upper surface of the light-emitting element 42.

[0063] Variation In the light sources according to Embodiments 1 to 8 described above, the optical lens 30 was composed of three lenses: a first optical lens 36, a second optical lens 37, and a third optical lens 38. However, the number of lenses constituting the optical lens is not limited to this. For example, as shown in Figure 15, the optical lens 930 may be composed of one lens. For example, as shown in Figure 16, the optical lens 1030 may be composed of two lenses: a first optical lens 1036 and a second optical lens 1037. Also, for example, the optical lens may be composed of four or more lenses.

[0064] In the light sources described in Embodiments 1 to 8 and their variations above, the optical lenses were supported by support portions 5 provided on the inner surface of the frame 3, but the means of supporting the optical lenses are not limited to this. For example, as shown in Figure 17, each optical lens 36, 37, and 38 may be supported by first legs 6A, second legs 6B, and third legs 6C connected to the ends of the first optical lens 36, second optical lens 37, and third optical lens 38, respectively.

[0065] The first leg portion 6A extends from the end of the first optical lens 36 to the upper surface 2a of the substrate 2 and supports the first optical lens 36. The second leg portion 6B extends from the end of the second optical lens 37 to the upper surface of the first leg portion 6A and supports the second optical lens 37. The third leg portion 6C extends from the end of the third optical lens 38 to the upper surface of the second leg portion 6B and supports the third optical lens 38.

[0066] The first leg portion 6A, the second leg portion 6B, and the third leg portion 6C may be formed of, for example, a light-reflective member or a light-shielding member. The first leg portion 6A, the second leg portion 6B, and the third leg portion 6C may be, for example, parts of a lens formed from the same material as the first optical lens 36, the second optical lens 37, and the third optical lens 38. In this case, the joining member 7 that joins each of the leg portions 6A, 6B, and 6C together can be, for example, an adhesive. Furthermore, the first leg portion 6A, the second leg portion 6B, and the third leg portion 6C may be a single, integrated component. Furthermore, when each optical lens is supported by legs connected to the ends of each optical lens in this manner, the light source does not need to have a frame.

[0067] Examples The following describes some examples. In the embodiment, a light source model was used based on the flash light source according to Embodiment 1, comprising a substrate, 25 independently illuminating light-emitting units, a first lens including 25 unit first lenses corresponding to each light-emitting unit, an optical lens positioned above the first lens, and a frame covering the light-emitting units, the first lens, and the optical lens, with an opening on its upper surface. The illuminance distribution in the irradiated area was then simulated.

[0068] The 25 light-emitting units were set to be arranged in a 5x5 matrix with their sides in contact with each other. The top view shape of each light-emitting unit was set to be a square with sides of 1.13 mm. The light-emitting surface of each light-emitting unit was set to be a square with sides of 0.24 mm. The illumination areas were set to correspond to each of the 25 light-emitting units and were arranged in a 5x5 matrix. Based on the camera's field of view and aspect ratio, the illumination areas were set to a rectangular plane with a short side of 280mm and a long side of 370mm, and the 25 illumination areas were arranged adjacent to each other on the same plane. The distance between the midpoint of the illumination area in the 3rd row and 3rd column and the midpoint of the central light-emitting part in the 3rd row and 3rd column was set to 30 cm. The optical lens consisted of three lenses: a first optical lens, a second optical lens, and a third optical lens. The refractive indices of the first, second, and third optical lenses were set to 1.58. The optical lenses were positioned so that their optical axes were perpendicular to the light-emitting surface of the central light-emitting part. The first unit lens, positioned corresponding to the light-emitting section, was also arranged in a 5x5 matrix. The refractive index of the first unit lens was set to 1.58. The central unit first lens, located in the 3rd row and 3rd column, was positioned so that its optical axis was aligned with the optical axis of the optical lens. The first unit lens located in the 2nd row, 3rd column, 3rd row, 2nd column, 3rd row, 4th column, and 4th row, 2nd column were positioned so that their respective optical axes were tilted 15° relative to the optical axis of the optical lens. In other words, the first and second angles were set to 15°. The first unit lens located in the 2nd row and 2nd column, the first unit lens located in the 2nd row and 4th column, the first unit lens located in the 4th row and 2nd column, and the first unit lens located in the 4th row and 4th column were positioned so that their respective optical axes were tilted at 22° relative to the optical axis of the optical lens. In other words, the third angle was set to 22°. The first unit lens located in the 1st row, 3rd column, the first unit lens located in the 3rd row, 1st column, the first unit lens located in the 3rd row, 5th column, and the first unit lens located in the 5th row, 3rd column were positioned so that their respective optical axes were tilted at 27° relative to the optical axis of the optical lens. In other words, the 4th and 5th angles were set to 27°. The first unit lens located in the 1st row, 2nd column, the 1st unit lens located in the 1st row, 4th column, the 2nd row, 1st column, the 2nd row, 5th column, the 4th row, 1st unit lens, the 4th row, 5th column, the 5th row, 2nd column, and the 5th row, 4th column were positioned so that their respective optical axes were tilted at 30.5° relative to the optical axis of the optical lens. In other words, the 6th and 7th angles were set to 30°. The first unit lens located in the first row, first column, the first unit lens located in the first row, fifth column, the first unit lens located in the fifth row, first column, and the first unit lens located in the fifth row, fifth column were positioned so that their respective optical axes were tilted at 35° relative to the optical axis of the optical lens. In other words, the eighth angle was set to 35°. It was assumed that air was present in the space where the unit lens (first lens) and the optical lens were in contact. The refractive index of air was set to 1. The shapes of the first and second surfaces of the optical lens, as well as the shape of the unit first lens, were appropriately set, taking the above settings into consideration, so that the light emitted from each light-emitting unit illuminates the corresponding illumination area.

[0069] In the light source model of the embodiment fabricated as described above, the light-emitting unit in the 3rd row and 1st column was turned on, and the illuminance distribution in the corresponding irradiation area was confirmed. The simulation results are shown in Figure 18. In the embodiment, the ratio of the amount of light emitted from the light-emitting unit to the amount of light irradiated into the irradiation area (light utilization efficiency) was 24%.

[0070] Comparative Example Next, we will explain the comparative examples. The comparative example's light source model had the same configuration as the light source in the embodiment, except that it lacked a first lens, and the conditions set for each component were also the same. In the comparative example's light source model, the light-emitting unit in the 3rd row and 1st column was turned on, and the illuminance distribution in the corresponding irradiation area was confirmed. The simulation results are shown in Figure 19. In the comparative example, the ratio of the amount of light emitted from the light-emitting unit to the amount of light irradiated into the irradiation area (light utilization efficiency) was 6.0%.

[0071] From the above simulation results, it can be seen that the light source model in the example can illuminate the desired area with sufficient light intensity compared to the light source model in the comparative example.

[0072] While embodiments, modifications, and examples of the present disclosure have been described above, the details of the disclosure may change, and changes in the combination and order of elements in the embodiments, modifications, and examples can be realized without departing from the claimed scope and spirit of the present disclosure.

[0073] The light source device of the present invention can irradiate a desired illumination area with light, making it suitable for use in lighting, camera flashes, vehicle headlights, and the like. However, the light source device of the present invention is not limited to these applications. [Explanation of Symbols]

[0074] 1, 201, 301, 401, 501, 601, 801, 901 light source 2 circuit boards 2a Top side 3 Frame 4 openings 5 Support part 6A, 6B, 6C legs 7. Joining members 10, 410, 510, 610 First lens 410a, 510a, 610a convex 610d, 610e top 610c concave 610f outer edge 11, 211, 311, 711 Unit 1 Lens 211a Convex 12, 312 top surface 13, 313, 713 bottom surface 14,714 recess 14a, 714a Inner surface of recess 15 Medial side 16, 716 connection part 20 Central Unit First Lens 21 Top side 23 Recess 23a Inner surface 24 Medial side 25 Perimeter Unit First Lens 26 Top side 28 recesses 28a Inner surface 29 Medial side 30, 930, 1030, 1130 Optical Lenses 31 Page 1 33 Incidence area 33a (center) incident area 33b (surrounding) incident area 33c 1st incidence area 33d 2nd incidence area 32 2nd page 34 Output area 34a (Center) Output area 34b (Surrounding) Emission Area 34c 1st output area 34d 2nd output area 36, 836, 936 First Optical Lens 37, 837, 937 Second optical lens 38,938 Third Optical Lens 41, 841 Light-emitting part 41a, 41a2, 41b1, 41b2, 50A1, 50B1, 841a Light-emitting surface 42 Light-emitting element 43 Semiconductor Stacks 44 electrode 45, 645, 845 wavelength conversion component 46 Light-reflective material 50, 50A, 50B central light-emitting section 55 Ambient light-emitting section 60 Light-emitting part B1, B2, B4, B6, B7 optical axis O one point P midpoint R1 area R33, R35, R42 irradiation area

Claims

1. A light source device for irradiating light into two or more irradiation areas, Each of the multiple light-emitting units has a light-emitting surface on its upper surface, emits light from the light-emitting surface at a first half-value full-angle, and can be selected to light up one or more units. A first lens covers the light-emitting surfaces of the plurality of light-emitting units and emits light from each of the light-emitting units at a second half-width angle smaller than the first half-width angle, The optical lens comprises a first surface located on the light-emitting surface side of the light-emitting part, which includes a plurality of incident regions corresponding to each of the light-emitting parts and into which light emitted from the light-emitting part enters through the first lens, and a second surface located on the opposite side of the first surface, which includes a plurality of exit regions corresponding to each of the plurality of incident regions, and is located above the light-emitting surface of the light-emitting part, The first lens receives light emitted from at least one of the light-emitting parts, tilted at an angle γ with respect to the optical axis of the optical lens, and is incident on the optical lens. A light source device that emits light from at least one light-emitting part and directs it from the optical lens toward an irradiation area corresponding to the angle γ.

2. A light source device for irradiating light into two or more irradiation areas, Each of the multiple light-emitting units has a light-emitting surface on its upper surface, emits light from the light-emitting surface at a first half-value full-angle, and can be selected to light up one or more units. A first lens covers the light-emitting surfaces of the plurality of light-emitting units and emits light from each of the light-emitting units at a second half-width angle smaller than the first half-width angle, The optical lens comprises a first surface that includes multiple incident regions and through which light emitted from the multiple light-emitting units is incident via the first lens, and a second surface that includes multiple outgoing regions, and is located above the light-emitting surface of the light-emitting unit, The first lens receives light emitted from at least one of the light-emitting parts, tilted at an angle γ with respect to the optical axis of the optical lens, and is incident on the optical lens. A light source device that emits light from at least one light-emitting part and directs it from the optical lens toward an irradiation area corresponding to the angle γ.

3. The light source device according to claim 1 or 2, wherein the first lens covers the light-emitting surfaces of the plurality of light-emitting units collectively and has at least one convex surface on the optical lens side.

4. The light source device according to claim 1 or 2, wherein the first lens covers the light-emitting surface of the light-emitting section collectively and includes a unit first lens provided for each light-emitting section.

5. The light source device according to claim 1 or 2, wherein the first lens includes a plurality of unit first lenses provided separately for each light-emitting section.

6. The light source device according to claim 4 or 5, wherein the optical axis of at least one of the unit first lenses is inclined at the angle γ with respect to the optical axis of the optical lens.

7. The plurality of light-emitting units are arranged in a matrix, The aforementioned angle γ is, The shortest distance L (0 < L) from the optical axis of the optical lens to the center of the light-emitting surface of the light-emitting part arranged in the corner of the matrix, The shortest distance x (0 < x ≤ L) from the optical axis of the optical lens to the center of the light-emitting surface of the light-emitting part covered by the unit first lens having an optical axis that is inclined from the optical axis of the optical lens, Using the intersection point of the plane on which the light-emitting surfaces of the plurality of light-emitting units extend and the optical axis of the optical lens as the center point, and the straight line connecting this center point to one of the two points located diagonally opposite the region that includes the entire illumination area, and the angle α (0° < α < 180°) formed by the straight line connecting the center point and the other point between the two, The light source device according to claim 6, as expressed as follows.

8. The light source device according to any one of claims 4 to 7, wherein the unit first lens has a convex surface on the optical lens side.

9. The light source device according to any one of claims 4 to 8, wherein the unit first lens is a columnar lens or a frustum lens.

10. The light source device according to any one of claims 4 to 7, wherein the unit first lens is an internal total internal reflection lens.

11. The aforementioned internal total internal reflection lens has a rotationally asymmetric shape with respect to the optical axis of the internal total internal reflection lens. The light source device according to claim 10, wherein the light-emitting surface of the light-emitting portion is covered by the inner surface of a recess provided on the light-emitting surface side of the internal total reflection lens.

12. The light source device according to any one of claims 1 to 11, wherein the optical lens is composed of a plurality of lenses.

13. Each of the incident regions of the optical lens is A first incident region into which light emitted from a light-emitting unit corresponding to the incident region is incident, A light source device according to any one of claims 1 to 12, further comprising: a second incident region into which light emitted from a light-emitting unit adjacent to the light-emitting unit is incident, in addition to the light said.

14. Each of the emission regions of the optical lens is A first emission region from which light incident on the optical lens via the incident region corresponding to the emission region is emitted, A light source device according to any one of claims 1 to 13, further comprising, in addition to the light, a second emission region from which light incident on the optical lens from an incidence region adjacent to the incidence region is emitted.

15. The light source device according to any one of the claims 4 to 11, or claims 12 to 14, which refer to claim 4 or 5, wherein the light-emitting portion and the illumination area irradiated by the light emitted from the light-emitting portion are in a point-symmetric arrangement with respect to a point located on the optical axis of the unit first lens arranged on the light-emitting portion.

16. The light source device according to claim 15, wherein the point corresponding to each of the plurality of light-emitting parts is the same point.

17. The light source device according to any one of claims 1 to 16, wherein the plurality of light-emitting units are arranged in an m x n matrix.

18. The light-emitting section includes a wavelength conversion member, The light-emitting surface of the light-emitting part is the upper surface of the wavelength conversion member, as described in any one of claims 1 to 17.

19. The plurality of light-emitting units are arranged on the upper surface of the substrate. A frame covering the plurality of light-emitting units, the first lens, and the optical lens is provided on the upper surface of the substrate. The light source device according to any one of claims 1 to 18, wherein the height from the top surface of the substrate to the top surface of the frame is 2.0 mm or more and 10.0 mm or less.

20. The light source device according to any one of claims 1 to 19, wherein the shortest distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 1.0 mm or less.

21. The light source device according to any one of claims 1 to 20, wherein the shortest distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 0.5 mm or less.

22. The light source device according to any one of claims 1 to 21, wherein the light emitted from the plurality of light-emitting units intersects with the optical axis of the optical lens or passes through the optical axis of the optical lens to illuminate the illumination area.

23. The light source device according to any one of claims 1 to 22 is a flashlight.

24. The light source device according to any one of claims 1 to 23, wherein the plurality of light-emitting units are arranged in a matrix, and the size of the light-emitting surface of the light-emitting unit located in the center is different from the size of the light-emitting surface of the light-emitting unit located in the corner.

25. The light source device according to any one of claims 1 to 24, wherein the plurality of light-emitting units are arranged in a matrix, and the size of the light-emitting surface of the light-emitting unit located in the center is larger than the size of the light-emitting surface of the light-emitting unit located in the corner.

26. The light source device according to any one of claims 1 to 24, wherein the plurality of light-emitting units are arranged in a matrix, and the size of the light-emitting surface of the light-emitting unit located at the corner is larger than the size of the light-emitting surface of the light-emitting unit located at the center.

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