Light source device

Abstract

To provide a light source device capable of irradiating a desired irradiation region with light of sufficient light volume.SOLUTION: A light source device for radiating light to two or more irradiation regions includes: a plurality of light emitting parts having a light emitting surface on an upper surface thereof, for emitting light at a first full angle at half-maximum from the light emitting surface, and capable of lighting individually; a first lens for covering the light emitting surfaces of the plurality of light emitting parts; and an optical lens including a first surface which corresponds to each of the light emitting parts, which includes a plurality of incident regions where the light emitted from the light emitting parts enters and which is located on the light emitting surface side of the light emitting part, and a second surface which includes a plurality of emission regions corresponding to each of the plurality of incident regions and which is located on an opposite side from the first surface, and located above the light emitting surface of the light emitting part. A shortest distance between the first surface of the optical lens and the first lens is equal to or greater than 0.1 mm and equal to or less than 1.0 mm, and the light emitted from each of the light emitting parts enters the optical lens via the first lens and emits from the first lens at a second full angle at half-maximum smaller than the first full angle at half-maximum.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] In recent years, light sources using multiple light-emitting elements such as light-emitting diodes have come into widespread use. For example, Patent Document 1 discloses a light source that can be used for the flash of a small camera such as a camera mounted on a mobile phone. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5275557 Summary of the Invention [Problem to be solved by the invention]

[0004] Such a light source used for, for example, a camera flash 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 that can irradiate a desired irradiation area with a sufficient amount of light. [Means for solving the problem]

[0006] a first lens covering the light-emitting surfaces of the light-emitting units; and an optical lens positioned above the light-emitting surfaces of the light-emitting units, the first surface including a plurality of entrance regions corresponding to each of the light-emitting units and into which the light emitted from the light-emitting units is incident, and a second surface located opposite the first surface including a plurality of exit regions corresponding to each of the entrance regions. 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. The light emitted from each of the light-emitting units is incident on the optical lens through the first lens and is emitted from the first lens at a second full angle at half maximum that is smaller than the first full angle at half maximum.

[0007] Furthermore, a light source device according to one embodiment of the present disclosure is a light source device for irradiating light onto two or more illumination regions, the light source device comprising: a plurality of light-emitting units each having a light-emitting surface on an upper surface, emitting light from the light-emitting surface at a first full angle at half maximum and capable of being turned on individually; 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 entrance regions and a second surface including a plurality of exit regions and positioned 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 enters the optical lens through the first lens and exits from the first lens at a second full angle at half maximum that is smaller than the first full angle at half maximum.

[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 from the light emitting surface at a first half-value full angle, and 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, wherein the light emitted from each of the light emitting portions enters the optical lens via the first lens, 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, and 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 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 TIFF2025142030000002.tif1277.

Advantages 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]2 is a top view of the light-emitting units in the flash light source shown in FIG. 1, in which the dimensions of the light-emitting surface differ from one light-emitting unit to another. [Figure 2C] 2 is a top view of the light-emitting units in the flash light source shown in FIG. 1, in which the dimensions of the light-emitting surface differ from one light-emitting unit to another. [Figure 3] 2 is a diagram illustrating the relationship between a light emitting unit of a flash light source shown in FIG. 1 and an illumination area provided corresponding to the light emitting unit. FIG. [Figure 4A] 2 is a cross-sectional view of the flash light source taken along line AA in FIG. 1. [Figure 4B] 2 is another cross-sectional view taken along line AA in the case where the unit first lenses are integrated to form the first lens in the flash light source shown in FIG. 1. FIG. [Figure 4C] FIG. 4B is an enlarged view of a portion of the cross-sectional view shown in FIG. 4A. [Figure 5] 4B is an enlarged cross-sectional view of the light-emitting portion and the first lens in the cross-sectional view shown in FIG. 4A. [Figure 6A] FIG. 4B is an enlarged view of a part of FIG. 4A, showing how light from the central light-emitting part enters the optical lens via the central unit first lens. [Figure 6B] The cross-sectional view shown in FIG. 4A shows how light emitted from a central unit first lens illuminates a corresponding illumination area via an optical lens. [Figure 7A] FIG. 4B is an enlarged view of a part of FIG. 4A, showing how light from the peripheral light-emitting parts enters the optical lens via the peripheral unit first lenses. [Figure 7B] The cross-sectional view shown in FIG. 4A shows how light emitted from the peripheral unit first lenses illuminates the corresponding illumination areas via the optical lenses. [Figure 8] FIG. 10 is a cross-sectional view of a flash light source according to a second embodiment of the present disclosure. [Figure 9] FIG. 10 is a cross-sectional view of a flash light source according to a third embodiment of the present disclosure. [Figure 10] FIG. 10 is a cross-sectional view of a flash light source according to a fourth embodiment of the present disclosure. [Figure 11]FIG. 10 is a cross-sectional view of a flash light source according to a fifth embodiment of the present disclosure. [Figure 12] FIG. 10 is a cross-sectional view of a flash light source according to a sixth embodiment of the present disclosure. [Figure 13] FIG. 13 is a cross-sectional view of a first lens included in a flash light source according to a seventh embodiment of the present disclosure. [Figure 14] FIG. 13 is a cross-sectional view of a flash light source according to an eighth embodiment of the present disclosure. [Figure 15] FIG. 10 is a cross-sectional view of a flash light source according to a modified example of the present disclosure. [Figure 16] FIG. 10 is a cross-sectional view of a flash light source according to a modified example of the present disclosure. [Figure 17] FIG. 10 is a cross-sectional view of a flash light source according to a modified example of the present disclosure. [Figure 18] FIG. 10 is a diagram showing a lighting state when the light-emitting unit in the third row and the first column is turned on in the flash light source according to the first embodiment of the present disclosure. [Figure 19] FIG. 10 is a diagram showing the lighting state when the light-emitting unit in the third row and first column is turned on in a light source having the same configuration as the flash light source according to the first embodiment of the present disclosure, except that it does not have a first lens. [Figure 20] 2 is a diagram showing the shortest distance L, the shortest distance x, and the angle α in the flash light source shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments and examples for carrying out the present invention will be described with reference to the drawings. Note that the flash light source, which is an example of a light source device according to the present disclosure, described below is intended to embody the technical concept of the present invention, and unless otherwise specified, the present invention is not limited to the following. In each drawing, components having the same function may be assigned the same symbol. For convenience, the embodiments and examples may be shown separately to facilitate explanation or understanding of the main points, but partial substitution or combination of the configurations shown in different embodiments and examples is possible. In the following embodiments and examples, descriptions of matters common to the above will be omitted, and only the differences will be described. In particular, similar effects due to similar configurations will not be mentioned sequentially in each embodiment or example. The size and positional relationship of components shown in each drawing may be exaggerated to clarify the explanation.

[0012] For example, in the case of a light source for a camera flash, the greater the number of divisions into which the entire illumination area is divided into individual illumination areas, the more precisely it becomes possible to distinguish between illumination areas that are illuminated with light and illumination areas that are not illuminated with light, thereby enabling a photograph in which the subject is captured more clearly. However, when the number of divisions is increased and the entire irradiation area is subdivided, the range of each irradiation area becomes smaller, making it difficult to focus the light emitted from each light-emitting unit onto the desired irradiation area using an optical lens (e.g., a camera lens), and making it difficult to irradiate the desired irradiation area with a sufficient amount of light. The inventors have conducted extensive research to solve this problem.

[0013] As a result, the inventors discovered that by using another lens in addition to the optical lens to narrow the full angle at half maximum (directional full angle at half maximum) of the light emitted from each light-emitting element and give it directionality, particularly directivity limited toward the desired irradiation area, before making it enter the optical lens, it is possible to illuminate the desired irradiation area with a sufficient amount of light.

[0014] A light source device according to one embodiment of the present disclosure has been made based on the above findings, and is a light source device for irradiating light to two or more illumination areas, the light source device comprising: a plurality of light-emitting units each having a light-emitting surface on an upper surface, emitting light from the light-emitting surface at a first full angle at half maximum and capable of being turned on individually; 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, the optical lens having: a first surface located on the light-emitting surface side of the light-emitting units, the first surface including a plurality of entrance regions corresponding to each of the light-emitting units and into which the light emitted from the light-emitting units is incident; and a second surface located opposite the first surface, the second surface including a plurality of exit regions corresponding to each of the plurality of entrance regions, the shortest distance between the first surface of the optical lens and the first lens being 0.1 mm or more and 1.0 mm or less; the light emitted from each of the light-emitting units entering the optical lens via the first lens, and the light being emitted from the first lens at a second full angle at half maximum that is smaller than the first full angle at half maximum.

[0015] Furthermore, a light source device according to another embodiment of the present disclosure has been made based on the above findings, and is a light source device for irradiating light onto two or more illumination regions, the light source device comprising: a plurality of light-emitting units each having a light-emitting surface on an upper surface, emitting light from the light-emitting surface at a first full angle at half maximum, and capable of being turned on individually; 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 entrance regions and a second surface including a plurality of exit regions, the optical lens being positioned 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 enters the optical lens through the first lens and exits from the first lens at a second full angle at half maximum that is smaller than the first full angle at half maximum.

[0016] Further, 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. The light source device has a light emitting surface on its upper surface, emits light from the light emitting surface at a first half-value full angle, and includes a plurality of individually lightable light emitting portions arranged in a matrix. The light source device also has a first lens that covers the light emitting surfaces of the plurality of light emitting portions, a first surface that includes a plurality of incident regions, and a second surface that includes a plurality of emission regions. The light source device further includes 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 having the inclined optical axis, a straight line connecting the center point (when 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 is taken as the center point) 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, and the angle α (0° < α < 180°) formed by these two straight lines. It is represented as TIFF2025142030000003.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 irradiating two or more illumination areas with light emitted from a light-emitting unit. Here, an illumination area refers to an area that extends around a certain direction as a center. In this embodiment, the two or more illumination areas refer to areas where the centers of the individual illumination areas are a predetermined distance apart, have a predetermined size, and are individually illuminated by the light emitted from the light-emitting units when the two or more light-emitting units are individually turned on. Furthermore, the term "two or more illumination areas" refers not to an area illuminated by a collective light emitted from the two or more light-emitting units, but to areas individually illuminated by the light emitted from the two or more light-emitting units. In the flash light source 1 according to this embodiment, as described below, multiple light-emitting units are provided to correspond to multiple illumination areas in different directions. This allows light to be irradiated onto a desired illumination area by selecting and turning on one or more of the multiple light-emitting units. 1, the light source 1 includes a substrate 2, 25 light-emitting units 41 arranged on an upper surface 2a of the substrate 2, a first lens 10 covering a light-emitting surface 41a arranged on the upper surface of each light-emitting unit 41 and including 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 light emitted from the light-emitting units 41 toward the corresponding irradiation 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 to the first surface 31. The first surface 31 corresponds to each of the light-emitting units 41 and includes a plurality of incident regions 33 onto which light emitted from the light-emitting units is incident. The second surface 32 includes a plurality of exit regions 34 corresponding to each of the incident regions 33. Note that the incident regions 33 and exit regions 34 shown in the figure are exaggerated to illustrate the areas. The light emitted from each light-emitting section 41 enters the optical lens 30 via the first lens 10, and then exits the optical lens 30 to illuminate the illumination areas arranged corresponding to each light-emitting section 41. In this embodiment, a frame 3 that covers the 25 light emitting portions 41, the first lens 10, and the optical lens 30 is disposed on the upper surface 2a of the substrate 2. In order to facilitate understanding of the internal structure of the light source 1, the optical lens 30 and the frame 3 in FIG. 1 are shown in cross section with some parts omitted.

[0018] Here, for example, the expression "unit first lens 11 is provided so as to "correspond" to light-emitting unit 41 means that unit first lens 11 is provided in a one-to-one relationship with light-emitting unit 41 so as to receive light emitted from light-emitting unit 41 and emit it toward optical lens 30. Also, for example, emission region 34 "corresponding" to entrance region 33 means a region that emits light that has entered optical lens 30 from entrance region 33 to the outside of optical lens 30, and is provided in a one-to-one relationship with entrance region 33. Furthermore, for example, an illumination region "corresponding" to light-emitting unit 41 means a region that is the target of illumination with light emitted from light-emitting unit 41, and is provided in a one-to-one relationship with light-emitting unit 41. In this specification, "correspondence" means a relationship between components, regions, or regions that are related to each other.

[0019] (Arrangement of light-emitting parts) 2A, the 25 light-emitting units 41 are arranged in a matrix of 5 rows and 5 columns. The light-emitting unit (central light-emitting unit 50) located at the center of the 25 light-emitting units 41 is the light-emitting unit arranged in the third row and third column. In this embodiment, the shape of each light-emitting portion 41 (including the central light-emitting portion 50) in a top view is square, and adjacent light-emitting portions 41 are arranged in contact with each other, but this is not limited thereto. For example, the shape of the light-emitting portion 41 in a top view may be rectangular, circular, polygonal, or the like. For example, adjacent light-emitting portions 41 may be arranged spaced apart from each other. Furthermore, the light-emitting portions 41 may have similar shapes of their light-emitting surfaces 41a in a top view. For example, as shown in FIG. 2B , the size of the light-emitting surfaces 50A1, 41a1, and 41a2 may decrease with increasing distance from the central light-emitting portion 50A. Furthermore, as shown in FIG. 2C , the size of the light-emitting surfaces 50B1, 41b1, and 41b2 may increase with increasing distance from the central light-emitting portion 50B. In other words, the size of the light-emitting surface 41a of each light-emitting portion 41 may vary depending on the location of the light-emitting portion 41 in the matrix arrangement. Here, the farther the light-emitting unit 41 is located from the optical axis of the optical lens 30, the longer the distance to the corresponding irradiation area, making it difficult to control the light distribution and resulting in a tendency for light loss to increase. Therefore, as shown in Fig. 2C, by making the light-emitting surfaces 41b1 and 41b2 larger for light-emitting units 41 farther from the central light-emitting unit 50B, the amount of light can be increased in the light-emitting units 41 farther from the central light-emitting unit 50B, and a decrease in brightness can be suppressed. Furthermore, the number of light-emitting units 41 is not limited to 25, but may be two or more. Furthermore, the arrangement of the light-emitting units 41 is not limited to a matrix of m rows and m columns (m≧2). It may be a matrix of m rows and n columns (m≧1, n≧2, m≠n), or may be an arrangement other than a matrix. For example, four light-emitting units 41 may be arranged in two rows and two columns, and 12 other light-emitting units 41 may be arranged around the four light-emitting units 41, with four on each side. Furthermore, eight other light-emitting units 41 may be arranged around the four other light-emitting units 41, with two on each side excluding the corners. This allows the light-emitting units 41 to be arranged in a shape close to a circle in a plan view. By making the optical lens 30 circular in a plan view, light from the light-emitting units 41 can be efficiently incident on the optical lens 30. Furthermore, the distances between adjacent light-emitting units 41 or between adjacent light-emitting surfaces 41a may be different. That is, the distance between two adjacent light-emitting sections 41 or two adjacent light-emitting surfaces 41a in the row direction may be shorter than the distance between two adjacent light-emitting sections 41 or two adjacent light-emitting surfaces 41a in the column direction.

[0020] (arrangement of irradiation areas) As shown in Fig. 3, the light source 1 according to this embodiment irradiates light onto an area R1 that is divided into 25 irradiation areas. The area R1 and each irradiation area shown in the figure are depicted as a schematic plane to facilitate understanding of the invention, but may actually be a three-dimensional space. The 25 irradiation areas are arranged in a matrix of 5 rows and 5 columns. One irradiation area corresponds to one light-emitting element 41, and is irradiated with light emitted from the corresponding light-emitting element 41. In this embodiment, 25 irradiation areas are arranged in a matrix, but the present invention is not limited to this. For example, the number of irradiation areas may be two or more. However, it is desirable that the number of irradiation areas is the same as the number of light-emitting units 41. Furthermore, the arrangement of the multiple irradiation areas is not limited to a matrix of i rows and i columns (i≧2), but may be a matrix of i rows and j columns (i≧1, j≧2, i≠j), or may be an arrangement that is not a matrix. However, it is desirable that the arrangement of the irradiation areas is the same as the arrangement of the light-emitting units 41.

[0021] (Arrangement of the light-emitting part and the irradiation area) In this embodiment, as shown in FIG. 3 , the positional relationship between each light-emitting element 41 and the corresponding irradiation 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 element 50. That is, each light-emitting element 41 and the irradiation area illuminated by light emitted from the light-emitting element are point-symmetric with respect to a point unique to the light-emitting element 41, and the unique point of each of the plurality of light-emitting elements is the same point (point O). For example, the irradiation area R33 located in the third row and third column of the 25 irradiation areas corresponds to the central light-emitting element 50 located in the third row and third column of the 25 light-emitting elements 41. For example, the irradiation area R35 located in the third row and fifth column of the 25 irradiation areas corresponds to the light-emitting element 55 located in the third row and first column of the 25 light-emitting elements 41. For example, the irradiation area R42 located in the fourth row and second column of the 25 irradiation areas corresponds to the light-emitting element 60 located in the second row and fourth column of the 25 light-emitting elements 41. As described above, the light-emitting units 41 and corresponding illumination areas are provided in a one-to-one relationship. However, this does not mean that the light emitted from the light-emitting unit 41 actually illuminates only the corresponding illumination area. The illumination area corresponding to a light-emitting unit 41 is the illumination area that the light-emitting unit 41 is intended to illuminate. Therefore, in reality, the light emitted from one light-emitting unit 41 may also illuminate an adjacent illumination area (or a nearby illumination area). In other words, as shown in FIG. 3 , one illumination area may include a region (first illumination area) R1A illuminated only by the light emitted from the corresponding light-emitting unit 41, and a region (second illumination area) R1B illuminated only by the light emitted from the corresponding light-emitting unit 41 and the light emitted from the light-emitting unit 41 and the light emitted from the light-emitting unit 41 adjacent to the corresponding light-emitting unit 41 (or a nearby light-emitting unit 41). Alternatively, one illumination area may not include the first illumination area R1A, but may include only the second illumination area R1B.

[0022] In the above description, the arrangement relationship between each light-emitting section 41 and the illumination area corresponding to the light-emitting section 41 is in a point-symmetric relationship with respect to one point O, but this is not limiting. For example, the reference point for point symmetry may be different for each light-emitting unit 41. That is, each light-emitting unit 41 and the irradiation area illuminated by the light emitted from that light-emitting unit are arranged in a point-symmetric relationship with respect to a point unique to that light-emitting unit 41. Furthermore, that unique point is, for example, a point on the optical axis B1 of a unit first lens 11 provided corresponding to that light-emitting unit 41. Therefore, the light-emitting unit 41 and the irradiation area illuminated by the light emitted from that light-emitting unit 41 may be arranged in a point-symmetric relationship with respect to a point located on the optical axis B1 of that unit first lens 11. Furthermore, the point corresponding to each of the multiple light-emitting units may be the same point. Furthermore, for example, the point serving as the reference point for point symmetry (point O in this embodiment) does not 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 element) Next, with reference to FIG. 1, the light distribution from the light emitting section 41 until the light irradiates 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 full angle at half maximum θ1 first enters the corresponding unit first lens 11, where the full angle at half maximum is narrowed by the unit first lens 11 to a second full angle at half maximum θ2 (θ1 > θ2). By setting the optical axis of the unit first lens 11 parallel to or tilted with respect to the optical axis B2 of the optical lens 30, the light has directivity toward the corresponding irradiation area. The light emitted from the unit first lens 11 enters the optical lens 30 from an entrance area 33 provided corresponding to each light-emitting unit 41. The light incident on the optical lens 30 exits the optical lens 30 from an exit area 34 provided corresponding to each entrance area 33, and illuminates an irradiation area that is positioned point-symmetrically to each light-emitting unit 41 with respect to a point O, for example.

[0024] The illustrated point O is a point on the optical axis B2 of the optical lens 30, as will be described later. Therefore, the light emitted from the central light-emitting element 50 is emitted along the optical axis B2 of the optical lens 30, i.e., in a direction substantially parallel to the optical axis B2, and irradiates the irradiation area R33 located directly above, while the light emitted from the light-emitting elements other than the central light-emitting element 50 each intersects with the optical axis B2 of the optical lens 30 and then irradiates the corresponding irradiation area. Here, in this specification, "along the optical axis of the optical lens" particularly means "through the optical axis of the optical lens." In this embodiment, the light-emitting units 41 and the corresponding irradiation areas are arranged in positions that are point-symmetrical with respect to a point O located directly above the central light-emitting unit 50, so that light emitted from light-emitting units 41 other than the central light-emitting unit 50 intersects with the optical axis B2 of the optical lens 30 to irradiate the corresponding light, but which light-emitting unit 41 intersects with the optical axis B2 of the optical lens 30 depends on the relative positioning of the light-emitting units 41 and the irradiation areas. That is, in this embodiment, the light emitted from the plurality of 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 illumination area.

[0025] In the light source 1 disclosed in this embodiment, one of the elements for irradiating the light emitted from each light-emitting section 41 onto the corresponding irradiation area is the shape of the entrance area 33 on the first surface 31 and the exit area 34 on the second surface 32 of the optical lens 30. Specifically, the light emitted from each light-emitting section 41 is irradiated onto the corresponding irradiation area by refraction of light in the entrance area 33 and the exit area 34. For this purpose, the shape of the entrance area 33 on the first surface 31 and the shape of the exit area 34 on the second surface 32 are set.

[0026] The refraction in the incident region 33 and the refraction in the exit region 34 of the optical lens 30 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 refractive index 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 also a parameter that should be taken into consideration. In the light source 1 of this embodiment, the medium in contact with the optical lens 30 is space, and, for example, air is located within the space. Therefore, in this embodiment, the refractive index 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 refractive index difference between the optical lens 30 and air.

[0027] Furthermore, light incident on the optical lens 30 is incident via the unit first lenses 11. Therefore, the light distribution characteristics of the unit first lenses 11 are also an element for irradiating the light emitted from the light emitting units 41 onto the corresponding irradiation areas. Specifically, this is the emission direction (directivity) of the light emitted from the unit first lenses 11, and this emission direction sets the direction of the optical axis of each unit first lens 11.

[0028] In order to irradiate the corresponding irradiation area with the light emitted from the light-emitting unit 41 in this manner, the shapes of the first surface 31 and the second surface 32 of the optical lens 30 are set. In addition, the refractive index 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 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. In this way, the shape of the incident region 33 and the shape of the exit region 34, which are elements for irradiating the light emitted from the light emitting unit 41 onto the corresponding irradiation region, are set, for example, by simulation, taking into account the parameters exemplified above. Each component will be described in detail below with reference to FIGS. 1, 4A, and 5.

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

[0030] (Frame) As shown in FIGS. 1 and 4A, a frame 3 is disposed on the upper surface 2a of the substrate 2. The frame 3 is hollow and has an opening 4 at the top. The frame 3 preferably has a light-absorbing material on the inner surface that does not reflect light. The light-absorbing material is formed from, for example, polycarbonate, silicone resin, PPS (Poly Phenyl Sarphayed), PA (Polyamide), or LCP (Liquid Crystal Plastic). The entire frame 3 may be formed from a light-absorbing material. A light-emitting unit 41, a first lens 10, and an optical lens 30 are disposed in the hollow of the frame 3. The height from the upper surface 2a of the substrate 2 to the top surface of the frame 3 is, for example, 2.0 mm or more and 10.0 mm or less. By setting the height from the upper surface 2a of the substrate 2 to the top surface of the frame 3 to such a height, the light source device 1 can be mounted in a small electronic device such as a smartphone.

[0031] (Light emitting part) As shown in Figure 5, the light-emitting section 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 side surfaces of the light-emitting element 42 and the wavelength conversion member 45. The light emitting element 42 has 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 a connection electrode of the substrate 2. When the light emitting element 42 is mounted face-down, it is desirable that the light emitting element 42 mainly emits light from the surface opposite to the surface on which the electrode 44 is provided (hereinafter referred to as the upper surface of the light emitting element 42). The light-reflecting member 46 is, for example, a white resin containing a light-diffusing material such as titanium oxide. By covering the side surfaces of the light-emitting element 42 with the light-reflecting member 46 in this manner, the light emitted from the side surfaces of the light-emitting element 42 can be reflected by the light-reflecting member 46 and emitted from the upper surface of the light-emitting element 42. In other words, the light emitted from the light-emitting element 42 can be used efficiently. The wavelength conversion member 45 is formed of, for example, a silicone resin containing a phosphor or the like. The upper surface of the wavelength conversion member 45 can be used as 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, it is possible to emit light in a desired wavelength range from the light emitting surface 41a of the light emitting unit 41. The light-emitting units 41 configured in this manner can be independently controlled to light up, that is, the light-emitting units 41 can be individually lit up.

[0032] (1st lens) The first lens 10 is provided to narrow the full angle at half maximum of light emitted from the light-emitting unit 41 and provide directionality toward the corresponding irradiation area of ​​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 according to this embodiment is composed of 25 unit first lenses 11 provided for each of the 25 light-emitting units 41. As shown in FIG. 1, the unit first lenses 11 are provided separately from one another. However, as shown in FIG. 4B, the unit first lenses 11 may be connected to adjacent unit first lenses to form a single integrated member. The first lens 10A thus formed by integrating the unit first lenses 11 collectively covers the light-emitting surfaces 41a of the 25 light-emitting units 41 and can be considered a single lens including the 25 unit first lenses 11 provided for each light-emitting unit 41.

[0033] The unit first lens 11 in this embodiment is a total internal reflection lens (TIR lens). Here, a total internal reflection lens is a lens that can adjust the directionality of light by utilizing total reflection inside the lens. As shown in FIG. 5 , the total internal reflection lens used in this embodiment has a lower surface 13 with a recess 14 and an upper surface 12 whose cross section is wavy, and is a lens with a substantially truncated cone shape that tapers from upper surface 12 to lower surface 13. The total internal reflection lens used in this embodiment has a rotationally symmetric shape about optical axis B1.

[0034] Unit first lens 11, which is an internal total reflection lens, is disposed such that inner surface 14a of recess 14 is located above light-emitting surface 41a of light-emitting portion 41 and light-emitting surface 41a is covered by inner surface 14a. In other words, unit first lens 11 is disposed such that opening end 16 of recess 14 (connection portion between inner surface 14a of recess 14 and lower surface 13) is located outside the outer periphery of light-emitting surface 41a in top view.

[0035] Next, the direction in which the optical axis B1 of the unit first lens 11 extends will be described with reference to FIGS. As shown in FIG. 2A , the unit first lenses 11 are arranged corresponding to the light-emitting units 41 arranged in a 5-row, 5-column matrix. The optical axis B1 of at least one unit first lens 11 is inclined relative to the optical axis B2 of the optical lens 30. In this embodiment, as shown in FIGS. 1 and 4A , the unit first lenses 11 other than the unit first lens (central unit first lens) 20 arranged on the central light-emitting unit 50 are arranged with their optical axes B1 inclined relative to the optical axis B2 of the optical lens 30, which will be described later. In this specification, the expression "inclined" means that the two optical axes intersect at an angle, i.e., 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 relative to the optical axis B2 of the optical lens 30 is appropriately set depending on the positional relationship between the light-emitting unit 41 on which the unit first lens 11 is arranged and the illumination area corresponding to the light-emitting unit 41. Specifically, the tilt angle is set so that the light emitted from the unit first lens 11 has a directionality more directed toward the corresponding irradiation area than when no unit first lens 11 is arranged. Therefore, the tilt angle can be set to a different value for each unit first lens 11 depending on the positional relationship between the light-emitting section 41 in which the unit first lens 11 is arranged and the irradiation area corresponding to the light-emitting section 41.

[0036] As described above, in this embodiment, the 25 light-emitting elements 41 arranged in 5 rows and 5 columns and the irradiation areas corresponding to each light-emitting element 41 have a point-symmetric arrangement relationship with respect to a point O above the central light-emitting element 50. Therefore, (1) The angles at which the optical axis of the unit first lens 11 arranged in the third row and second column and the optical axis of the unit first lens 11 arranged in the third row and fourth column are inclined with respect to the optical axis B2 of the optical lens 30 are the same angle (first angle); (2) the angles at which the optical axis of the unit first lens 11 arranged in the second row and third column and the optical axis of the unit first lens 11 arranged in the fourth row and third column are inclined relative to the optical axis B2 of the optical lens 30 are the same angle (second angle); (3) the optical axes of the unit first lenses 11 arranged in the second row and second column, the optical axes of the unit first lenses 11 arranged in the second row and fourth column, the optical axes of the unit first lenses 11 arranged in the fourth row and second column, and the optical axes of the unit first lenses 11 arranged in the fourth row and fourth column are inclined at the same angle (third angle) with respect to the optical axis B2 of the optical lens 30; (4) the optical axis of the unit first lens 11 arranged in the third row and first column and the optical axis of the unit first lens 11 arranged in the third row and fifth column are inclined at the same angle (fourth angle) with respect to the optical axis B2 of the optical lens 30; (5) the optical axis of the unit first lens 11 arranged in the first row and third column and the optical axis of the unit first lens 11 arranged in the fifth row and third column are inclined at the same angle (fifth angle) with respect to the optical axis B2 of the optical lens 30; (6) the optical axis of the unit first lens 11 arranged in the second row and the first column, the optical axis of the unit first lens 11 arranged in the second row and the fifth column, the optical axis of the unit first lens 11 arranged in the fourth row and the first column, and the optical axis of the unit first lens 11 arranged in the fourth row and the fifth column are inclined at the same angle (sixth angle) with respect to the optical axis B2 of the optical lens 30; (7) the optical axis of the unit first lens 11 arranged in the first row and second column, the optical axis of the unit first lens 11 arranged in the first row and fourth column, the optical axis of the unit first lens 11 arranged in the fifth row and second column, and the optical axis of the unit first lens 11 arranged in the fifth row and fourth column are inclined at the same angle (seventh angle) with respect to the optical axis B2 of the optical lens 30; (8) The optical axis of the unit first lens 11 arranged in the first row and first column, the optical axis of the unit first lens 11 arranged in the first row and fifth column, the optical axis of the unit first lens 11 arranged in the fifth row and first column, and the optical axis of the unit first lens 11 arranged in the fifth row and fifth column are each inclined at the same angle (the eighth angle) relative to the optical axis B2 of the optical lens 30.

[0037] Furthermore, when the shape of the light-emitting section 41 in top view 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 angle and the fifth angle 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 angle and the second angle; (e) the fourth angle and the fifth angle are set to be larger than the first angle and the second angle; (f) the sixth and seventh angles are set larger than the fourth and fifth angles; (g) The eighth angle is set to be larger than the sixth angle and the seventh angle.

[0038] When light-emitting sections 41 are arranged in a matrix, a specific method for calculating the angle γ (see FIG. 4C) at which the optical axis B1 of at least one unit first lens 11 is inclined relative to the optical axis B2 of the optical lens 30 will be described with reference to FIG. 20. Note that the unit first lens 11 is omitted in FIG. 20 to make the drawing easier to understand. 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 unit 41 arranged at the corner of the matrix is ​​L(0 <L)とし; (a) The shortest distance to the center of the light-emitting surface 41a of the light-emitting unit 41 (in the example shown in FIG. 20, the light-emitting surface 41a of the light-emitting unit 41 arranged in the third row and fourth column) covered by the unit first lens 11 having the optical axis B1 inclined from the optical axis B2 of the optical lens 30 is defined as x(0 <x≦L)とし; (c) When the intersection point between the plane on which the light-emitting surfaces 41a of the plurality of light-emitting units 41 extend and the optical axis B2 of the optical lens 30 (in the example shown in FIG. 20 , the center P of the light-emitting surface 50a of the central light-emitting unit 50) is defined as the center point Q0, the angle formed by a line S1 connecting the center point Q0 and one point Q1 of two points located diagonally in the region R1 (the region including all of the two or more irradiation regions) and a line S2 connecting the center point Q0 and the other point Q2 of the two points is defined as α (0°<α<180°); The angle γ can be calculated, for example, by the following equation 1. The light emitting units 41 located at the corners of the matrix are the light emitting units located at the four corners of the matrix. Therefore, in the case of a matrix with 5 rows and 5 columns, for example, the light emitting units 41 located at the corners of the matrix are the light emitting unit 41 at the 1st row and 1st column, the light emitting unit 41 at the 1st row and 5th column, the light emitting unit 41 at the 5th row and 1st column, or the light emitting unit 41 at the 5th row and 5th column. Formula 1

[0039] TIFF2025142030000004.tif1277

[0040] (optical lenses) As shown in FIG. 4A , the optical lens 30 is disposed above the light-emitting elements 41 and collectively covers the 25 light-emitting elements 41 and the first lens 10. The optical lens 30 according to this embodiment is composed of multiple lenses, specifically, a first optical lens 36, a second optical lens 37, and a third optical lens 38, arranged in this order from the first lens 10 side. The first optical lens 36, the second optical lens 37, and the third optical lens 38 are disposed with spaces between them. Air, for example, is present in the spaces. The first optical lens 36, the second optical lens 37, and the third optical lens 38 are supported and fixed by placing their ends on supports 5 provided on the inner side surfaces of the frame 3. Note that the support portions supporting the second optical lens 37 and the third optical lens 38 are omitted in the attached drawings. The first optical lens 36, the second optical lens 37, and the third optical lens 38 are disposed with their optical axes aligned. Therefore, the optical axis B2 of the optical lens 30 is specified as one axis. In this embodiment, the optical lens 30 is disposed so that the 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 portion 50. Therefore, the point O that defines the point-symmetric arrangement relationship between the light-emitting portion 41 and the corresponding irradiation area is located on the optical axis B2 of the optical lens 30. The method for 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 parts 5 provided on the inner side surfaces of the frame body 3. For example, the first optical lens 36, the second optical lens 37, and the third optical lens 38 may be attached to and supported by support rods provided on the inner upper surface of the frame body 3.

[0041] The optical lens 30 has 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 to the first surface 31, i.e., on the side of the opening 4 of the frame 3. When the optical lens 30 has a first optical lens 36, a second optical lens 37, and a third optical lens 38 as in this embodiment, 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 corresponding to the respective light-emitting sections 41 and into which light emitted from the respective light-emitting sections 41 is incident. The second surface 32 includes a plurality of exit regions 34 corresponding to the respective entrance regions 33. As described above, the light distribution of light emitted from each light-emitting unit 41 is determined by setting the shapes of the first surface 31 including the incident region 33 and the second surface 32 including 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 arranged so as to be separated from one another by air. Therefore, the light distribution between the incident region 33 and the exit region 34 can be affected by the shape of the region (exit region) from which light exits the first optical lens 36, the difference between the refractive index of the first optical lens 36 and that of air, the shape of the region (incident region) from which light enters the second optical lens 37, the shape of the region (exit region) from which light exits the second optical lens 37, the difference between the refractive index of the second optical lens 37 and that of air, the shape of the region (incident region) from which light enters the third optical lens 38, and the difference between the refractive index of the third optical lens 38 and that of air. Therefore, the shapes of the entrance area 33 and the exit area 34 are designed taking these factors into consideration.

[0043] The incident regions 33, where light emitted from adjacent light-emitting units 41 enter the optical lens 30, may partially or completely overlap depending on 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 relative to the optical axis B2 of the optical lens 30, and other factors. Therefore, two adjacent incident regions 33 of the optical lens 30 may partially or completely overlap. In this specification, the region of each incident region 33 onto which only light emitted from the corresponding unit first lens 11 enters is referred to as a first incident region 33c, and the region of each incident region 33 that overlaps with the adjacent incident region 33 is referred to as a second incident region 33d. The first incident region 33c and the second incident region 33d are shown in FIG. 4C . Therefore, each incident region 33 of the optical lens 30 may include a first incident region 33c onto which light emitted from the light-emitting section 41 corresponding to the incident region 33 is incident, and a second incident region 33d onto which light emitted from the light-emitting section 41 adjacent to the incident region 33 is incident in addition to the first incident region 33c. Therefore, each incident region 33 is not necessarily designed independently, but may be appropriately designed in relation to the adjacent incident regions.

[0044] Similarly, the exit regions 34 from which light incident on the optical lens 30 through adjacent entrance regions 33 exit the optical lens 30 may partially or completely overlap, depending on the positions of the corresponding entrance regions 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 irradiation regions, and the like. Therefore, two adjacent exit regions 34 of the optical lens 30 may partially or completely overlap. In this specification, the region of each exit region 34 from which only light emitted from the corresponding unit first lens 11 exits is referred to as a first exit region 34c, and the region of each exit region 34 that overlaps with the adjacent exit region 34 is referred to as a second exit region 34d. The first exit region 34c and the second exit region 34d are shown in FIG. 4A . Therefore, each exit region 34 of the optical lens 30 may include a first exit region 34c from which light that has entered the optical lens 30 via the entrance region 33 corresponding to the exit region 34 exits, and a second exit region 34d from which light that has entered the optical lens 30 from an entrance region 33 adjacent to the exit region 34 exits in addition to the first exit region 34c. Therefore, each exit region 34 is not necessarily designed independently, but may be appropriately designed in relation to the adjacent exit region 34.

[0045] 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, and preferably, for example, 0.1 mm or more and 0.5 mm or less. In this embodiment, the shortest distance d0 refers to the shortest distance between the first surface 31 of the optical lens 30 and the first lens 10, regardless of the shapes of the first surface 31 and 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 at this height, the light source device 1 can be mounted in a small electronic device such as a smartphone.

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

[0047] (Light distribution from central light emitting part 50) As shown in FIGS. 6A and 6B, the light emitted from the light emitting surface 50a of the central light emitting portion 50 at the first full angle at half maximum θ1 is mainly (1) Light is incident on 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 reflection occurs at the inner side surface 24 of the central unit first lens 20, (3) The light is emitted from the upper surface 21 of the central unit first lens 20 at a second full angle at half maximum θ2, (4) The light is incident on the optical lens 30 from the incident area 33a corresponding to the central light-emitting portion 50 (see FIG. 6B ). (5) The light is emitted from the exit area 34a corresponding to the entrance area 33a to the outside of the optical lens 30. (6) Irradiate the irradiation area R33 corresponding to the central light emitting portion 50 (the irradiation area located directly above the central light emitting portion 50).

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

[0049] (Light distribution from light emitting parts other than the central light emitting part 50) The distribution of light from light-emitting parts other than the central light-emitting part 50 differs depending on the position of the light-emitting part, but is the same in that the light emitted from the light-emitting part intersects with the optical axis B2 of the optical lens 30 and illuminates the corresponding illumination area. Therefore, the light distribution of light emitted from light-emitting units other than the central light-emitting unit 50 will be described using the light-emitting unit (peripheral light-emitting unit) 55 (see FIG. 2A) arranged at the position of the first row and third column as an example. As shown in FIG. 7A, the light emitted from the light emitting surface 55a of the peripheral light emitting portion 55 at the first full angle at half maximum θ1 is mainly (1) The light is incident on the peripheral unit first lens 25 from the inner surface 28a of the recess 28 of the unit first lens (peripheral unit first lens) 25 arranged to cover the light-emitting surface 55a of the peripheral light-emitting portion 55 (see FIG. 7A ), (2) Total reflection occurs on the inner side surface 29 of the surrounding unit first lens 25, (3) The light is emitted from the upper surface 26 of the peripheral unit first lens 25 at a second full angle at half maximum θ2, (4) The light is incident on the optical lens 30 from the incident area 33b corresponding to the peripheral light-emitting portion 55 (see FIG. 7B ). (5) intersects with the optical axis B2 of the optical lens 30 within the optical lens 30; (6) The light is emitted from the exit area 34b corresponding to the entrance area 33b to the outside of the optical lens 30. (7) Illumination area R35 corresponding to the surrounding light emitting portion 55 is illuminated. In addition, the position where the light emitted from the surrounding light-emitting unit 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 between the time the light is emitted from the surrounding light-emitting unit 55 and the time it illuminates the corresponding illumination area R35.

[0050] As described above, in this embodiment, the 25 light-emitting elements 41 and the irradiation areas corresponding to each light-emitting element 41 have a point-symmetric arrangement relationship with respect to a point O above the central light-emitting element 50. Therefore, the peripheral unit first lenses 25 are arranged so that their optical axes B1 intersect with the optical axis B2 of the optical lens 30 above the central light-emitting element 50. As a result, the light emitted from the light-emitting elements 41 via the peripheral unit lenses 25 has higher directivity toward the corresponding irradiation areas R35 compared to when the peripheral unit lenses 25 are not provided. The shape of the entrance area 33b (entrance area of ​​the first optical lens 36) of the optical lens 30 corresponding to the peripheral light-emitting portion 55 and the shape of the exit area 34b (exit area of ​​the third optical lens 38) of the optical lens 30 are appropriately designed so that the light emitted from the peripheral unit first lens 25 irradiates the irradiation area R35 arranged in a position point-symmetrical with the peripheral light-emitting portion 55 with respect to a point O. Similarly, the shape of the exit area of ​​the first optical lens 36, the shape of the entrance area and the shape of the exit area of ​​the second optical lens 37, and the shape of the entrance area of ​​the third optical lens 38 are appropriately designed so that the light emitted from the surrounding unit first lens irradiates an irradiation area arranged in a position point-symmetrical with respect to the surrounding light-emitting section and a point O.

[0051] As described above, the light source 1 according to this embodiment includes the first lens 10 arranged to cover the light-emitting surface 41a of the light-emitting unit 41, and the light emitted from the light-emitting surface 41a of the light-emitting unit 41 has its full angle at half maximum narrowed by the first lens 10, and is then incident on the optical lens 30 after having high directivity toward the corresponding irradiation area. This makes it possible to efficiently irradiate the corresponding desired irradiation area with the light emitted from the light-emitting surface 41a of the light-emitting unit 41.

[0052] 2. Embodiment 2 8 differs from the light source 1 according to the first embodiment in that the unit first lens is a lens having one convex surface (convex surface) facing the optical lens 30. The unit first lens 211 according to the second embodiment has, for example, a semicircular cross-sectional shape, and the convex surface 211a is formed as a smoothly curved surface. The unit first lens 211 is arranged such that the light emitting surface 41a of the light emitting section 41 is covered with the lower surface 211b. Since the unit first lenses 211 have a simple shape, it is easy to form a mold for forming the unit first lenses 211 .

[0053] 3. Embodiment 3 A light source 301 according to embodiment 3 shown in FIG. 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. The unit first lens 311 according to embodiment 3 has an upper surface 312 and a lower surface 313 each having, for example, a circular, triangular, or rectangular shape. The unit first lens 311 is disposed such that the lower surface 313 covers the light-emitting surface 41a of the light-emitting unit 41. The unit first lens 311 is not limited to a frustum-shaped lens in which the area of ​​the upper surface 312 is larger than the area of ​​the lower surface 313, but may be a frustum lens in which the area of ​​the upper surface 312 is smaller than the area of ​​the lower surface 313, or may be a cylindrical lens in which the area of ​​the upper surface 312 is equal to the area of ​​the lower surface 313. Like the above-described internal total reflection lens, such a unit first lens 311 can adjust the directionality of light by utilizing reflection within the unit first lens 311. Since the unit first lens 311 has a simple shape, it is easy to form a mold for forming the unit first lens 311 .

[0054] 4. Embodiment 4 This embodiment differs from the light source 1 of embodiment 1 in that the first lens is a lens that collectively covers the light-emitting surfaces 41a of multiple light-emitting sections 41 and has at least one convex surface (convex surface) on the optical lens 30 side.

[0055] The first lens 410 of the light source 401 according to this embodiment has one convex surface (convex surface) 410a facing the optical lens 30. As shown in Fig. 10, the cross-sectional contour of the convex surface 410a of the first lens 410 is arc-shaped, and the convex surface 410a is formed as a smoothly curved surface. The first lens 410 is disposed such that the light-emitting surfaces 41a of all the light-emitting units 41 are collectively covered by the lower surface 410b. Such a first lens 410 has a simple shape, and therefore it is easy to form a mold used to form the first lens 410. Furthermore, with such a first lens 410, it is not necessary to adjust the arrangement for each light-emitting section 41 and arrange a corresponding lens (unit first lens 11) as in the first embodiment, and it is sufficient to arrange, for example, the optical axis B4 of the first lens 410 on the optical axis B2 of the optical lens 30, which can simplify the manufacturing process.

[0056] Furthermore, the curvature of convex surface 410a of first lens 410 may be the same from optical axis B4 to the end of first lens 410, or may vary depending on the distance from optical axis B4. In particular, by increasing the curvature of convex surface 410a of first lens 410 from optical axis B4 toward the end of first lens 410, the following effects are expected. First, of the light emitted from the light-emitting units 41 arranged near the ends of the convex surface 410a of the first lens 410 (for example, in this embodiment, the light-emitting units 41 arranged in the first row, the kth column, the fifth row, the kth column, the kth row, the first column, and the kth row, the fifth column (k = 1 to 5)), light that deviates from the direction in which directivity is desired (in this embodiment, the direction of the irradiation area corresponding to the light-emitting units 41), particularly light heading toward the frame 3, is unlikely to be incident on the optical lens 30. Therefore, the loss of light from the light-emitting units 41 is large. Therefore, by making the curvature of the ends of the convex surface 410a of the first lens 410 larger than the curvature of the center, it is possible to refract the light heading toward the frame 3, out of the light emitted from the light-emitting units 41 arranged near the ends of the convex surface 410a, in the direction in which directivity is desired, and it is possible to reduce the loss of light from the light-emitting units 41.

[0057] 5. Embodiment 5 11 , the first lens 510 of the light source 501 according to this embodiment has one convex surface (convex surface) 510a facing the optical lens 30. As shown in FIG. 11 , the first lens 510 includes a flat surface 510b located in the center of the convex surface 510a, and a curved surface 510c that connects the flat surface 510b and a bottom surface 510d of the first lens 510 and is located at an end of the first lens 510. Flat surface 510b is perpendicular to optical axis B2 of optical lens 30. Curved surface 510c is curved toward the outside of first lens 510. First lens 510 is disposed such that upper surfaces 41a of all light-emitting portions 41 are collectively covered by lower surface 510d. As described for light source 401 of embodiment 4, in light source 501 of this embodiment, by increasing the curvature of curved surface 510c of first lens 510 on the edge side of first lens 510, light emitted from light-emitting unit 41 disposed near the edge of first lens 510 can be refracted in a desired direction of directivity (in this embodiment, the direction of the irradiation area corresponding to light-emitting unit 41). Therefore, light loss from light-emitting unit 41 can be reduced. Furthermore, by making the central portion of convex surface 510a of first lens 510 flat, the lens thickness can be made thinner than that of a first lens having a single convex curved surface on the entire optical lens 30 side as in light source 401 of embodiment 4, and therefore the light source can be made more compact.

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

[0059] 7. Embodiment 7 The light source according to the seventh embodiment differs from the light source 1 according to the first embodiment in that the unit first lenses other than the central unit first lens are internal total reflection lenses having a rotationally asymmetric shape about the optical axis, as shown in FIG. 13 . The unit first lenses 711 other than the central unit first lens according to the seventh embodiment are internal total reflection lenses having a rotationally asymmetric shape about the optical axis B7, in which a connection portion 716 (open end of the recess 714) between the lower surface 713 and an inner surface 714a of a recess 714 provided in the lower surface 713 surrounds the light-emitting surface 41a and is formed in contact with the upper surface 41b of the light-emitting unit 41. In such a unit first lens 711, the light-emitting surface 41a of the light-emitting unit 41 is covered by the inner surface 714a of the recess 714 located on the light-emitting surface 41a side. Therefore, as indicated by arrow Y in FIG. 13 , substantially all of the light emitted from the light-emitting surface 41a of the light-emitting unit 41 enters the unit first lens 711 via the inner surface 714a of the recess 714 of the unit first lens 711. This allows the efficiency of using light emitted from the light emitting section 41 to be improved.

[0060] The inclination angle of the unit first lens 711 relative to the optical axis of the optical lens differs depending on which row and column the light-emitting unit is arranged in in the 5-row by 5-column matrix, and therefore the shape of the unit first lens 711 differs depending on each light-emitting unit 41. However, in this embodiment, the 25 light-emitting elements 41 and the illumination regions corresponding to the respective light-emitting elements 41 are arranged in point symmetry with respect to a point O above the central light-emitting element 50. Therefore, (1) The unit first lens 711 arranged in the third row and second column and the unit first lens 711 arranged in the third row and fourth column have the same shape (shape 1); (2) The unit first lens 711 arranged in the second row and third column and the unit first lens 711 arranged in the fourth row and third column have the same shape (shape 2); (3-1) The unit first lens 711 arranged in the second row and second column and the unit first lens 711 arranged in the fourth row and fourth column have the same shape (shape 3-1); (3-2) The unit first lens 711 arranged in the second row and fourth column and the unit first lens 711 arranged in the fourth row and second column have the same shape (shape 3-2); (4) The unit first lens 711 arranged in the third row and first column and the unit first lens 711 arranged in the third row and fifth column have the same shape (shape 4); (5) The unit first lens 711 arranged in the first row and third column and the unit first lens 711 arranged in the fifth row and third column have the same shape (shape 5); (6-1) The unit first lens 711 arranged in the second row and first column and the unit first lens 711 arranged in the fourth row and fifth column have the same shape (shape 6-1); (6-2) The unit first lens 711 arranged in the second row and fifth column and the unit first lens 711 arranged in the fourth row and first column have the same shape (shape 6-2); (7-1) The unit first lens 711 arranged in the first row and second column and the unit first lens 711 arranged in the fifth row and fourth column have the same shape (shape 7-1); (7-2) The unit first lens 711 arranged in the first row and fourth column and the unit first lens 711 arranged in the fifth row and second column have the same shape (shape 7-2); (8-1) The unit first lens 711 arranged in the first row and first column and the unit first lens 711 arranged in the fifth row and fifth column have the same shape (shape 8-1); (8-2) The unit first lens 711 arranged in the first row and fifth column and the unit first lens 711 arranged in the fifth row and first column have the same shape (shape 8-2).

[0061] Furthermore, when 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, 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 and 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 14 differs from the light source 1 according to the first embodiment in that the wavelength conversion member provided in the light-emitting section is disposed so as 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 the eighth embodiment may be provided for each light-emitting section 41, or may be a single member that collectively covers the upper surfaces of the semiconductor laminates 43 and the light-reflecting members 46 of all 25 light-emitting sections 41. Since the wavelength conversion member 845 is a thin member, when the wavelength conversion member 845 is arranged in this manner to cover the upper surface of the light-emitting element 42 and the upper surface of the light-reflective member 46, the light-emitting surface 841a of the light-emitting section 841 can be considered to be the area of ​​the wavelength conversion member 845 located directly above the upper surface of the light-emitting element 42.

[0063] Variations In the light sources according to the first to eighth embodiments described above, the optical lens 30 is composed of three lenses, namely, the first optical lens 36, the second optical lens 37, and the third optical lens 38. However, the number of lenses constituting the optical lens is not limited to this. For example, as shown in FIG. 15, the optical lens 930 may be composed of one lens. For example, as shown in FIG. 16, the optical lens 1030 may be composed of two lenses, namely, the first optical lens 1036 and the second optical lens 1037. Furthermore, for example, the optical lens may be composed of four or more lenses.

[0064] In the light sources according to the above-described first to eighth embodiments and the modified examples, the optical lenses are supported by the support parts 5 provided on the inner surface of the frame body 3, but the means for supporting the optical lenses is not limited to this. For example, as shown in Fig. 17, the first optical lens 36, the second optical lens 37, and the third optical lens 38 may each be supported by a first leg part 6A, a second leg part 6B, and a third leg part 6C connected to the ends of the first optical lens 36, the second optical lens 37, and the third optical lens 38, respectively.

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

[0066] The first leg 6A, the second leg 6B, and the third leg 6C may be formed of, for example, a light-reflective material or a light-blocking material. The first leg 6A, the second leg 6B, and the third leg 6C may be part of a lens formed of, for example, 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 the legs 6A, 6B, and 6C together may be, for example, an adhesive. Furthermore, the first leg 6A, the second leg 6B and the third leg 6C may be integrated into one single member. In this case, when each optical lens is supported by a leg connected to the end of the optical lens, the light source does not need to have a frame.

[0067] Example Examples will be described below. In the examples, based on the light source for the flash according to embodiment 1, a simulation of the illuminance distribution in the irradiation area was performed using a light source model including a substrate, 25 light-emitting units that can be turned on independently, a first lens including 25 unit first lenses provided corresponding to each of the light-emitting units, an optical lens arranged above the first lens, and a frame body that covers the light-emitting units, the first lens, and the optical lens and has an opening on its top surface.

[0068] The 25 light-emitting elements were arranged in a 5-row x 5-column matrix with their sides touching each other. The top view shape of each light-emitting element was set to a square with a side length of 1.13 mm. The light-emitting surface of each light-emitting element was set to a square with a side length of 0.24 mm. The irradiation areas corresponded to each of the 25 light-emitting units and were set to be arranged in a matrix of 5 rows and 5 columns. Taking into consideration the camera's angle of view and aspect ratio, the irradiation areas were set to a rectangular plane with short sides of 280 mm and long sides of 370 mm, and the 25 irradiation areas were set to be adjacent to each other on the same plane. The distance between the midpoint of the irradiation area in the third row and third column and the midpoint of the central light-emitting part in the third row and third column was set to 30 cm. The optical lens was composed of three lenses: a first optical lens, a second optical lens, and a third optical lens. The refractive indexes of the first optical lens, the second optical lens, and the third optical lens 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 unit first lenses arranged corresponding to the light emitting portions were also arranged in a matrix of 5 rows x 5 columns. The refractive index of the unit first lenses was set to 1.58. The central unit first lens located in the third row and third column was arranged so that its optical axis was positioned on the optical axis of the optical lens. The unit first lens arranged in the second row and third column, the unit first lens arranged in the third row and second column, the unit first lens arranged in the third row and fourth column, and the unit first lens arranged in the fourth row and second column were set to be arranged with their optical axes tilted by 15° with respect to the optical axis of the optical lens, that is, the first angle and the second angle were set to 15°. The unit first lens arranged in the second row and second column, the unit first lens arranged in the second row and fourth column, the unit first lens arranged in the fourth row and second column, and the unit first lens arranged in the fourth row and fourth column were set to be arranged with their optical axes tilted by 22° with respect to the optical axis of the optical lens. In other words, the third angle was set to 22°. The first unit lens arranged in the first row and third column, the first unit lens arranged in the third row and first column, the first unit lens arranged in the third row and fifth column, and the first unit lens arranged in the fifth row and third column were set so that their optical axes were inclined at 27° with respect to the optical axes of the optical lenses, i.e., the fourth angle and the fifth angle were set to 27°. The first unit lens arranged in the first row and second column, the first unit lens arranged in the first row and fourth column, the first unit lens arranged in the second row and first column, the first unit lens arranged in the second row and fifth column, the first unit lens arranged in the fourth row and first column, the first unit lens arranged in the fourth row and fifth column, the first unit lens arranged in the fifth row and second column, and the first unit lens arranged in the fifth row and fourth column were set to be arranged with their optical axes tilted by 30.5° with respect to the optical axis of the optical lens. In other words, the sixth angle and the seventh angle were set to 30°. The first unit lens arranged in the first row and first column, the first unit lens arranged in the first row and fifth column, the first unit lens arranged in the fifth row and first column, and the first unit lens arranged in the fifth row and fifth column were set so that their optical axes were inclined by 35° with respect to the optical axes of the optical lenses. In other words, the eighth angle was set to 35°. The refractive index of air was set to 1. The shapes of the first and second surfaces of the optical lens and the unit first lenses were appropriately set, taking into consideration the above settings, so that the light emitted from each light-emitting element would illuminate the corresponding illumination area.

[0069] In the light source model of the example produced as described above, the light-emitting unit in the third row and first column was turned on to check the illuminance distribution in the corresponding irradiation area. The simulation results are shown in Figure 18. In the example, the ratio of the amount of light irradiated onto the irradiation area to the amount of light emitted from the light-emitting unit (light utilization efficiency) was 24%.

[0070] Comparative Example Next, a comparative example will be described. The light source model of the comparative example had the same configuration as the light source according to the example, except that it did not have the first lens, and the conditions set for each member were also the same. In the light source model of the comparative example, the light-emitting unit in the third row and first column was turned on, and the illuminance distribution in the corresponding irradiation area was confirmed. The simulation results are shown in Fig. 19. In the comparative example, the ratio of the amount of light irradiated onto the irradiation area to the amount of light emitted from the light-emitting unit (light utilization efficiency) was 6.0%.

[0071] From the above simulation results, it can be seen that the light source model of the example can irradiate a desired area with a sufficient amount of light compared to the light source model of the comparative example.

[0072] The above describes embodiments, modifications, and examples of the present disclosure, but the disclosed contents may vary in details of the configuration, and changes in the combination and order of elements in the embodiments, modifications, and examples may be realized without departing from the scope and spirit of the claimed disclosure.

[0073] The light source device of the present invention can irradiate a desired irradiation area with light, and therefore can be suitably used for illumination, camera flashes, vehicle headlights, etc. 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 boards 2a Top side 3 Frame 4 Openings 5 Support part 6A, 6B, 6C legs 7 Joint materials 10, 410, 510, 610 First lens 410a, 510a, 610a convex 610d, 610e top 610c concave 610f Outer edge 11, 211, 311, 711 unit first 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 20. Central unit first lens 21 Top side 23 Recess 23a Inner surface 24 Medial side 25 Peripheral Unit First Lens 26 Top side 28 Recess 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 laminate 44 electrode 45, 645, 845 wavelength conversion material 46 Light-reflective material 50, 50A, 50B central light emitting part 55 Surrounding light emitting part 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 onto two or more illumination areas, a plurality of light-emitting units each having a light-emitting surface on an upper surface thereof, each emitting light from the light-emitting surface at a first full angle at half maximum, and capable of being individually turned on; a first lens covering light emitting surfaces of the plurality of light emitting units; an optical lens positioned above the light emitting surface of the light emitting unit, the optical lens comprising: a first surface positioned on the light emitting surface side of the light emitting unit, the first surface including a plurality of incident regions corresponding to each of the light emitting units and into which light emitted from the light emitting units is incident; and a second surface positioned on the opposite side to the first surface, the second surface including a plurality of exit regions corresponding to each of the plurality of incident regions; Equipped with 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; The light emitted from each of the light emitting units is is incident on the optical lens through the first lens, The light source device emits light from the first lens at a second full angle at half maximum that is smaller than the first full angle at half maximum.

2. A light source device for irradiating light onto two or more illumination areas, a plurality of light-emitting units each having a light-emitting surface on an upper surface thereof, each emitting light from the light-emitting surface at a first full angle at half maximum, and capable of being individually turned on; a first lens covering light emitting surfaces of the plurality of light emitting units; an optical lens having a first surface including a plurality of incident regions and a second surface including a plurality of exit regions, the optical lens being positioned above the light emitting surface of the light emitting unit; Equipped with 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; The light emitted from each of the light emitting units is is incident on the optical lens through the first lens, The light source device emits light from the first lens at a second full angle at half maximum that is smaller than the first full angle at half maximum.

3. The light source device according to claim 1 , wherein the first lens collectively covers the light emitting surfaces of the plurality of light emitting portions and has at least one convex surface facing the optical lens.

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

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

6. The light source device according to claim 4 , wherein 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.

7. The plurality of light-emitting units are arranged in a matrix, The angle γ is a 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 unit arranged at the corner of the matrix; a 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 unit covered by the unit first lens having the optical axis provided at an angle; When the intersection point between the plane on which the light-emitting surfaces of the plurality of light-emitting units extend and the optical axis of the optical lens is set as a center point, an angle α (0°<α<180°) formed by a line connecting the center point and one of two points located diagonally in an area including all of the irradiation areas, and a line connecting the center point and the other of the two points; Using The light source device according to claim 6 , wherein:

8. 8. The light source device according to claim 4, wherein the unit first lens has a convex surface facing the optical lens.

9. 9. The light source device according to claim 4, wherein the unit first lenses are cylindrical lenses or frustum lenses.

10. 8. The light source device according to claim 4, wherein the unit first lens is an internal total reflection lens.

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

12. 12. The light source device according to claim 1, wherein the optical lens is made up of a plurality of lenses.

13. Each of the entrance areas of the optical lens is a first incident area into which light emitted from a light emitting unit corresponding to the incident area is incident; a second incident region into which light emitted from a light emitting section adjacent to the light emitting section is incident in addition to the light; The light source device according to any one of claims 1 to 12, comprising:

14. Each of the exit areas of the optical lens is a first exit area from which light that has entered the optical lens via an entrance area corresponding to the exit area exits; a second exit region from which light incident on the optical lens from an entrance region adjacent to the entrance region exits in addition to the light; The light source device according to any one of claims 1 to 13, comprising:

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

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

17. 17. The light source device according to claim 1, wherein the plurality of light emitting sections are arranged in a matrix of m rows and n columns.

18. the light emitting unit includes a wavelength conversion member, 18. The light source device according to claim 1, wherein the light emitting surface of the light emitting portion is an upper surface of the wavelength conversion member.

19. the plurality of light-emitting units are disposed on an upper surface of a 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; 19. The light source device according to claim 1, wherein the height from the upper surface of the substrate to the uppermost surface of the frame is 2.0 mm or more and 10.0 mm or less.

20. 20. The light source device according to claim 1, 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.

21. The light source device according to any one of claims 1 to 20, wherein the light emitted from the plurality of light-emitting units irradiates the irradiation area by intersecting the optical axis of the optical lens or by passing through the optical axis of the optical lens.

22. The light source device according to any one of claims 1 to 21 is a flashlight.

23. A light source device for irradiating light onto two or more illumination areas, a plurality of light-emitting units that have a light-emitting surface on an upper surface, emit light from the light-emitting surface at a first full angle at half maximum, and are arranged in a matrix and can be individually turned on; a first lens covering light emitting surfaces of the plurality of light emitting units; an optical lens having a first surface including a plurality of incident regions and a second surface including a plurality of exit regions, the optical lens being positioned above a light emitting surface of the light emitting unit; Equipped with The light emitted from each of the light emitting units is is incident on the optical lens through the first lens, exiting the first lens at a second full angle at half maximum that is smaller than the first full angle at half maximum; the first lens includes a plurality of unit first lenses provided for each of the light-emitting units, an 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 a 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 unit arranged at the corner of the matrix; a 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 unit covered by the unit first lens having the optical axis provided at an angle; When the intersection point between the plane on which the light-emitting surfaces of the plurality of light-emitting units extend and the optical axis of the optical lens is set as a center point, an angle α (0°<α<180°) formed by a line connecting the center point and one of two points located diagonally across an area including all of the irradiation areas, and a line connecting the center point and the other of the two points; Using A light source device expressed as follows.

Images